Graphical User Interface

Graphical User Interface (GUI) offers user interaction via some graphical components. For example our underlying Operating System also offers GUI via window,frame,Panel, Button, Textfield, TextArea, Listbox, Combobox, Label, Checkbox etc. These all are known as components. Using these components we can create an interactive user interface for an application.
GUI provides result to end user in response to raised events.GUI is entirely based events. For example clicking over a button, closing a window, opening a window, typing something in a textarea etc. These activities are known as events.GUI makes it easier for the end user to use an application. It also makes them interesting.

Basic Terminologies

Term	Description
Component	Component is an object having a graphical representation that can be displayed on the screen and that can interact with the user. For examples buttons, checkboxes, list and scrollbars of a graphical user interface.
Container	Container object is a component that can contain other components.Components added to a container are tracked in a list. The order of the list will define the components' front-to-back stacking order within the container. If no index is specified when adding a component to a container, it will be added to the end of the list.
Panel	Panel provides space in which an application can attach any other components, including other panels.
Window	Window is a rectangular area which is displayed on the screen. In different window we can execute different program and display different data. Window provide us with multitasking environment. A window must have either a frame, dialog, or another window defined as its owner when it's constructed.
Frame	A Frame is a top-level window with a title and a border. The size of the frame includes any area designated for the border. Frame encapsulates window. It and has a title bar, menu bar, borders, and resizing corners.
Canvas	Canvas component represents a blank rectangular area of the screen onto which the application can draw. Application can also trap input events from the use from that blank area of Canvas component.

Examples of GUI based Applications

Following are some of the examples for GUI based applications.

Automated Teller Machine (ATM)
Airline Ticketing System
Information Kiosks at railway stations
Mobile Applications
Navigation Systems

Advantages of GUI over CUI

GUI provides graphical icons to interact while the CUI (Character User Interface) offers the simple text-based interfaces.
GUI makes the application more entertaining and interesting on the other hand CUI does not.
GUI offers click and execute environment while in CUI every time we have to enter the command for a task.
New user can easily interact with graphical user interface by the visual indicators but it is difficult in Character user interface.
GUI offers a lot of controls of file system and the operating system while in CUI you have to use commands which is difficult to remember.
Windows concept in GUI allow the user to view, manipulate and control the multiple applications at once while in CUI user can control one task at a time.
GUI provides multitasking environment so as the CUI also does but CUI does not provide same ease as the GUI do.
Using GUI it is easier to control and navigate the operating system which becomes very slow in command user interface. GUI can be easily customized.

Environment Setup

This section guides you on how to download and set up Java on your machine. Please follow the following steps to set up the environment.
Java SE is freely available from the link Download Java. So you download a version based on your operating system.
Follow the instructions to download java and run the .exe to install Java on your machine. Once you installed Java on your machine, you would need to set environment variables to point to correct installation directories:

Setting up the path for windows 2000/XP:

Assuming you have installed Java in c:\Program Files\java\jdk directory:

Right-click on 'My Computer' and select 'Properties'.
Click on the 'Environment variables' button under the 'Advanced' tab.
Now alter the 'Path' variable so that it also contains the path to the Java executable. Example, if the path is currently set to 'C:\WINDOWS\SYSTEM32', then change your path to read 'C:\WINDOWS\SYSTEM32;c:\Program Files\java\jdk\bin'.

Setting up the path for windows 95/98/ME:

Assuming you have installed Java in c:\Program Files\java\jdk directory:

Edit the 'C:\autoexec.bat' file and add the following line at the end:
'SET PATH=%PATH%;C:\Program Files\java\jdk\bin'

Setting up the path for Linux, UNIX, Solaris, FreeBSD:

Environment variable PATH should be set to point to where the java binaries have been installed. Refer to your shell documentation if you have trouble doing this.
Example, if you use bash as your shell, then you would add the following line to the end of your '.bashrc: export PATH=/path/to/java:$PATH'

Popular Java Editors:

To write your java programs you will need a text editor. There are even more sophisticated IDE available in the market. But for now, you can consider one of the following:

Notepad : On Windows machine you can use any simple text editor like Notepad (Recommended for this tutorial), TextPad.
Netbeans :is a Java IDE that is open source and free which can be downloaded from http://www.netbeans.org/index.html.
Eclipse : is also a java IDE developed by the eclipse open source community and can be downloaded from http://www.eclipse.org/.

AWT Controls

Every user interface considers the following three main aspects:

UI elements : Thes are the core visual elements the user eventually sees and interacts with. GWT provides a huge list of widely used and common elements varying from basic to complex which we will cover in this tutorial.
Layouts: They define how UI elements should be organized on the screen and provide a final look and feel to the GUI (Graphical User Interface). This part will be covered in Layout chapter.
Behavior: These are events which occur when the user interacts with UI elements. This part will be covered in Event Handling chapter.

Every AWT controls inherits properties from Component class.

AWT Component Class

Introduction

The class Component is the abstract base class for the non menu user-interface controls of AWT. Component represents an object with graphical representation.

Class declaration

Following is the declaration for java.awt.Component class:

public abstract class Component
   extends Object
      implements ImageObserver, MenuContainer, Serializable

Field

Following are the fields for java.awt.Component class:

static float BOTTOM_ALIGNMENT -- Ease-of-use constant for getAlignmentY.
static float CENTER_ALIGNMENT -- Ease-of-use constant for getAlignmentY and getAlignmentX.
static float LEFT_ALIGNMENT -- Ease-of-use constant for getAlignmentX.
static float RIGHT_ALIGNMENT -- Ease-of-use constant for getAlignmentX.
static float TOP_ALIGNMENT -- Ease-of-use constant for getAlignmentY().

Class constructors

S.N.	Constructor & Description
1	protected Component() This creates a new Component.

Class methods

S.N.	Method & Description
1	boolean action(Event evt, Object what) Deprecated. As of JDK version 1.1, should register this component as ActionListener on component which fires action events.
2	void add(PopupMenu popup) Adds the specified popup menu to the component.
3	void addComponentListener(ComponentListener l) Adds the specified component listener to receive component events from this component.
4	void addFocusListener(FocusListener l) Adds the specified focus listener to receive focus events from this component when this component gains input focus.
5	void addHierarchyBoundsListener(HierarchyBoundsListener l) Adds the specified hierarchy bounds listener to receive hierarchy bounds events from this component when the hierarchy to which this container belongs changes.
6	void addHierarchyListener(HierarchyListener l) Adds the specified hierarchy listener to receive hierarchy changed events from this component when the hierarchy to which this container belongs changes.
7	void addInputMethodListener(InputMethodListener l) Adds the specified input method listener to receive input method events from this component.
8	void addKeyListener(KeyListener l) Adds the specified key listener to receive key events from this component.
9	void addMouseListener(MouseListener l) Adds the specified mouse listener to receive mouse events from this component.
10	void addMouseMotionListener(MouseMotionListener l) Adds the specified mouse motion listener to receive mouse motion events from this component.
11	void addMouseWheelListener(MouseWheelListener l) Adds the specified mouse wheel listener to receive mouse wheel events from this component.
12	void addNotify() Makes this Component displayable by connecting it to a native screen resource.
13	void addPropertyChangeListener(PropertyChangeListener listener) Adds a PropertyChangeListener to the listener list.
14	void addPropertyChangeListener(String propertyName, PropertyChangeListener listener) Adds a PropertyChangeListener to the listener list for a specific property.
15	void applyComponentOrientation(ComponentOrientation orientation) Sets the ComponentOrientation property of this component and all components contained within it.
16	boolean areFocusTraversalKeysSet(int id) Returns whether the Set of focus traversal keys for the given focus traversal operation has been explicitly defined for this Component.
17	int checkImage(Image image, ImageObserver observer) Returns the status of the construction of a screen representation of the specified image.
18	int checkImage(Image image,int width,int height, ImageObserver observer) Returns the status of the construction of a screen representation of the specified image.
19	boolean contains(int x,int y) Checks whether this component "contains" the specified point, where x and y are defined to be relative to the coordinate system of this component.
20	boolean contains(Point p) Checks whether this component "contains" the specified point, where the point's x and y coordinates are defined to be relative to the coordinate system of this component.
21	Image createImage(ImageProducer producer) Creates an image from the specified image producer.
22	Image createImage(int width,int height) Creates an off-screen drawable image to be used for double buffering.
23	VolatileImage createVolatileImage(int width,int height) Creates a volatile off-screen drawable image to be used for double buffering.
24	VolatileImage createVolatileImage(int width,int height, ImageCapabilities caps) Creates a volatile off-screen drawable image, with the given capabilities.
25	void deliverEvent(Event e) Deprecated. As of JDK version 1.1, replaced by dispatchEvent(AWTEvent e).
26	void disable() Deprecated. As of JDK version 1.1, replaced by setEnabled(boolean).
27	protected void disableEvents(long eventsToDisable) Disables the events defined by the specified event mask parameter from being delivered to this component.
28	void dispatchEvent(AWTEvent e) Dispatches an event to this component or one of its sub components.
29	void doLayout() Prompts the layout manager to lay out this component.
30	void enable() Deprecated. As of JDK version 1.1, replaced by setEnabled(boolean).
31	void enable(boolean b) Deprecated. As of JDK version 1.1, replaced by setEnabled(boolean).
32	protected void enableEvents(long eventsToEnable) Enables the events defined by the specified event mask parameter to be delivered to this component.
33	void enableInputMethods(boolean enable) Enables or disables input method support for this component.
34	protected void firePropertyChange(String propertyName, boolean oldValue, boolean newValue) Support for reporting bound property changes for boolean properties.
35	void firePropertyChange(String propertyName, byte oldValue, byte newValue) Reports a bound property change.
36	void firePropertyChange(String propertyName, char oldValue, char newValue) Reports a bound property change.
37	void firePropertyChange(String propertyName, double oldValue, double newValue) Reports a bound property change.
38	void firePropertyChange(String propertyName, float oldValue, float newValue) Reports a bound property change.
39	void firePropertyChange(String propertyName, long oldValue, long newValue) Reports a bound property change.
40	protected void firePropertyChange(String propertyName, Object oldValue, Object newValue) Support for reporting bound property changes for Object properties.
41	void firePropertyChange(String propertyName, short oldValue, short newValue) Reports a bound property change.
42	AccessibleContext getAccessibleContext() Gets the AccessibleContext associated with this Component.
43	float getAlignmentX() Returns the alignment along the x axis.
44	float getAlignmentY() Returns the alignment along the y axis.
45	Color getBackground() Gets the background color of this component.
46	int getBaseline(int width,int height) Returns the baseline.
47	Component.BaselineResizeBehavior getBaselineResizeBehavior() Returns an enum indicating how the baseline of the component changes as the size changes.
48	Rectangle getBounds() Gets the bounds of this component in the form of a Rectangle object.
49	Rectangle getBounds(Rectangle rv) Stores the bounds of this component into return value rv and return rv.
50	ColorModel getColorModel() Gets the instance of ColorModel used to display the component on the output device.
51	Component getComponentAt(int x,int y) Determines if this component or one of its immediate subcomponents contains the (x, y) location, and if so, returns the containing component.
52	Component getComponentAt(Point p) Returns the component or subcomponent that contains the specified point.
53	ComponentListener[] getComponentListeners() Returns an array of all the component listeners registered on this component.
54	ComponentOrientation getComponentOrientation() Retrieves the language-sensitive orientation that is to be used to order the elements or text within this component.
55	Cursor getCursor() Gets the cursor set in the component.
56	DropTarget getDropTarget() Gets the DropTarget associated with this Component.
57	Container getFocusCycleRootAncestor() Returns the Container which is the focus cycle root of this Component's focus traversal cycle.
58	FocusListener[] getFocusListeners() Returns an array of all the focus listeners registered on this component.
59	Set<AWTKeyStroke> getFocusTraversalKeys(int id) Returns the Set of focus traversal keys for a given traversal operation for this Component.
60	boolean getFocusTraversalKeysEnabled() Returns whether focus traversal keys are enabled for this Component.
61	Font getFont() Gets the font of this component.
62	FontMetrics getFontMetrics(Font font) Gets the font metrics for the specified font.
63	Color getForeground() Gets the foreground color of this component.
64	Graphics getGraphics() Creates a graphics context for this component.
65	GraphicsConfiguration getGraphicsConfiguration() Gets the GraphicsConfiguration associated with this Component.
66	int getHeight() Returns the current height of this component.
67	HierarchyBoundsListener[] getHierarchyBoundsListeners() Returns an array of all the hierarchy bounds listeners registered on this component.
68	HierarchyListener[] getHierarchyListeners() Returns an array of all the hierarchy listeners registered on this component.
69	boolean getIgnoreRepaint()
70	InputContext getInputContext() Gets the input context used by this component for handling the communication with input methods when text is entered in this component.
71	InputMethodListener[] getInputMethodListeners() Returns an array of all the input method listeners registered on this component.
72	InputMethodRequests getInputMethodRequests() Gets the input method request handler which supports requests from input methods for this component.
73	KeyListener[] getKeyListeners() Returns an array of all the key listeners registered on this component.
74	<T extends EventListener> T[] getListeners(Class<T> listenerType) Returns an array of all the objects currently registered as FooListeners upon this Component.
75	Locale getLocale() Gets the locale of this component.
76	Point getLocation() Gets the location of this component in the form of a point specifying the component's top-left corner.
77	Point getLocation(Point rv) Stores the x,y origin of this component into return value rv and return rv.
78	Point getLocationOnScreen() Gets the location of this component in the form of a point specifying the component's top-left corner in the screen's coordinate space.
79	Dimension getMaximumSize() Gets the maximum size of this component.
80	Dimension getMinimumSize() Gets the mininimum size of this component.
81	MouseListener[] getMouseListeners() Returns an array of all the mouse listeners registered on this component.
82	MouseMotionListener[] getMouseMotionListeners() Returns an array of all the mouse motion listeners registered on this component.
83	Point getMousePosition() Returns the position of the mouse pointer in this Component's coordinate space if the Component is directly under the mouse pointer, otherwise returns null.
84	MouseWheelListener[] getMouseWheelListeners() Returns an array of all the mouse wheel listeners registered on this component.
85	String getName() Gets the name of the component.
86	Container getParent() Gets the parent of this component.
87	java.awt.peer.ComponentPeer getPeer() Deprecated. As of JDK version 1.1, programs should not directly manipulate peers; replaced by boolean isDisplayable().
88	Dimension getPreferredSize() Gets the preferred size of this component.
89	PropertyChangeListener[] getPropertyChangeListeners() Returns an array of all the property change listeners registered on this component.
90	PropertyChangeListener[] getPropertyChangeListeners(String propertyName) Returns an array of all the listeners which have been associated with the named property.
91	Dimension getSize() Returns the size of this component in the form of a Dimension object.
92	Dimension getSize(Dimension rv)Stores the width/height of this component into return value rv and return rv.
93	Toolkit getToolkit() Gets the toolkit of this component.
94	Object getTreeLock() Gets this component's locking object (the object that owns the thread sychronization monitor) for AWT component-tree and layout operations.
95	int getWidth() Returns the current width of this component.
96	int getX() Returns the current x coordinate of the components origin.
97	int getY() Returns the current y coordinate of the components origin.
98	boolean gotFocus(Event evt, Object what) Deprecated. As of JDK version 1.1, replaced by processFocusEvent(FocusEvent) .
99	boolean handleEvent(Event evt) Deprecated. As of JDK version 1.1 replaced by processEvent(AWTEvent).
100	boolean hasFocus() Returns true if this Component is the focus owner.
101	void hide() Deprecated. As of JDK version 1.1, replaced by setVisible(boolean).
102	boolean imageUpdate(Image img,int infoflags,int x,int y,int w,int h) Repaints the component when the image has changed.
103	boolean inside(int x,int y) Deprecated. As of JDK version 1.1, replaced by contains(int, int).
104	void invalidate() Invalidates this component.
105	boolean isBackgroundSet() Returns whether the background color has been explicitly set for this Component.
106	boolean isCursorSet() Returns whether the cursor has been explicitly set for this Component.
107	boolean isDisplayable() Determines whether this component is displayable.
108	boolean isDoubleBuffered() Returns true if this component is painted to an offscreen image (buffer) that's copied to the screen later.
109	boolean isEnabled() Determines whether this component is enabled.
110	boolean isFocusable() Returns whether this Component can be focused.
111	boolean isFocusCycleRoot(Container container) Returns whether the specified Container is the focus cycle root of this Component's focus traversal cycle.
112	boolean isFocusOwner() Returns true if this Component is the focus owner.
113	boolean isFocusTraversable() Deprecated. As of 1.4, replaced by isFocusable().
114	boolean isFontSet() Returns whether the font has been explicitly set for this Component.
115	boolean isForegroundSet() Returns whether the foreground color has been explicitly set for this Component.
116	boolean isLightweight() A lightweight component doesn't have a native toolkit peer.
117	boolean isMaximumSizeSet() Returns true if the maximum size has been set to a non-null value otherwise returns false.
118	boolean isMinimumSizeSet() Returns whether or not setMinimumSize has been invoked with a non-null value.
119	boolean isOpaque() Returns true if this component is completely opaque, returns false by default.
120	boolean isPreferredSizeSet() Returns true if the preferred size has been set to a non-null value otherwise returns false.
121	boolean isShowing() Determines whether this component is showing on screen.
122	boolean isValid() Determines whether this component is valid.
123	boolean isVisible() Determines whether this component should be visible when its parent is visible.
124	boolean keyDown(Event evt,int key) Deprecated. As of JDK version 1.1, replaced by processKeyEvent(KeyEvent).
125	boolean keyUp(Event evt,int key) Deprecated. As of JDK version 1.1, replaced by processKeyEvent(KeyEvent).
126	void layout() Deprecated. As of JDK version 1.1, replaced by doLayout().
127	void list() Prints a listing of this component to the standard system output stream System.out.
128	void list(PrintStream out) Prints a listing of this component to the specified output stream.
129	void list(PrintStream out,int indent) Prints out a list, starting at the specified indentation, to the specified print stream.
130	void list(PrintWriter out) Prints a listing to the specified print writer.
131	void list(PrintWriter out,int indent) Prints out a list, starting at the specified indentation, to the specified print writer.
132	Component locate(int x,int y) Deprecated. As of JDK version 1.1, replaced by getComponentAt(int, int).
133	Point location() Deprecated. As of JDK version 1.1, replaced by getLocation().
134	boolean lostFocus(Event evt, Object what) Deprecated. As of JDK version 1.1, replaced by processFocusEvent(FocusEvent).
135	boolean mouseDown(Event evt,int x,int y) Deprecated. As of JDK version 1.1, replaced by processMouseEvent(MouseEvent).
136	boolean mouseDrag(Event evt,int x,int y) Deprecated. As of JDK version 1.1, replaced by processMouseMotionEvent(MouseEvent).
137	boolean mouseEnter(Event evt,int x,int y) Deprecated. As of JDK version 1.1, replaced by processMouseEvent(MouseEvent).
138	boolean mouseExit(Event evt,int x,int y) Deprecated. As of JDK version 1.1, replaced by processMouseEvent(MouseEvent)..
139	boolean mouseMove(Event evt,int x,int y) Deprecated. As of JDK version 1.1, replaced by processMouseMotionEvent(MouseEvent)..
140	boolean mouseUp(Event evt,int x,int y) Deprecated. As of JDK version 1.1, replaced by processMouseEvent(MouseEvent).
141	void move(int x,int y) Deprecated. As of JDK version 1.1, replaced by setLocation(int, int).
142	void nextFocus() Deprecated. As of JDK version 1.1, replaced by transferFocus().
143	void paint(Graphics g) Paints this component.
144	void paintAll(Graphics g) Paints this component and all of its subcomponents.
145	boolean postEvent(Event e) Deprecated. As of JDK version 1.1, replaced by dispatchEvent(AWTEvent).
146	boolean prepareImage(Image image,int width,int height, ImageObserver observer) Prepares an image for rendering on this component at the specified width and height.
147	void print(Graphics g) Prints this component.
148	void printAll(Graphics g) Prints this component and all of its subcomponents.
149	protectedvoid processComponentEvent(ComponentEvent e) Processes component events occurring on this component by dispatching them to any registered ComponentListener objects.
150	protected void processEvent(AWTEvent e) Processes events occurring on this component.
151	protected void processFocusEvent(FocusEvent e) Processes focus events occurring on this component by dispatching them to any registered FocusListener objects.
152	protected void processHierarchyBoundsEvent(HierarchyEvent e) Processes hierarchy bounds events occurring on this component by dispatching them to any registered HierarchyBoundsListener objects.
153	protected void processHierarchyEvent(HierarchyEvent e) Processes hierarchy events occurring on this component by dispatching them to any registered HierarchyListener objects.
154	protectedvoid processInputMethodEvent(InputMethodEvent e) Processes input method events occurring on this component by dispatching them to any registered InputMethodListener objects.
155	protected void processKeyEvent(KeyEvent e) Processes key events occurring on this component by dispatching them to any registered KeyListener objects.
156	protected void processMouseEvent(MouseEvent e) Processes mouse events occurring on this component by dispatching them to any registered MouseListener objects.
157	protected void processMouseMotionEvent(MouseEvent e) Processes mouse motion events occurring on this component by dispatching them to any registered MouseMotionListener objects.
158	protected void processMouseWheelEvent(MouseWheelEvent e) Processes mouse wheel events occurring on this component by dispatching them to any registered MouseWheelListener objects.
159	void remove(MenuComponent popup) Removes the specified popup menu from the component.
160	void removeComponentListener(ComponentListener l) Removes the specified component listener so that it no longer receives component events from this component.
161	void removeFocusListener(FocusListener l) Removes the specified focus listener so that it no longer receives focus events from this component.
162	void removeHierarchyBoundsListener(HierarchyBoundsListener l) Removes the specified hierarchy bounds listener so that it no longer receives hierarchy bounds events from this component.
163	void removeHierarchyListener(HierarchyListener l) Removes the specified hierarchy listener so that it no longer receives hierarchy changed events from this component.
164	void removeInputMethodListener(InputMethodListener l) Removes the specified input method listener so that it no longer receives input method events from this component.
165	void removeKeyListener(KeyListener l) Removes the specified key listener so that it no longer receives key events from this component.
166	void removeMouseListener(MouseListener l) Removes the specified mouse listener so that it no longer receives mouse events from this component.
167	void removeMouseMotionListener(MouseMotionListener l) Removes the specified mouse motion listener so that it no longer receives mouse motion events from this component.
168	void removeMouseWheelListener(MouseWheelListener l) Removes the specified mouse wheel listener so that it no longer receives mouse wheel events from this component.
169	void removeNotify() Makes this Component undisplayable by destroying it native screen resource.
170	void removePropertyChangeListener(PropertyChangeListener listener) Removes a PropertyChangeListener from the listener list.
171	void removePropertyChangeListener(String propertyName, PropertyChangeListener listener) Removes a PropertyChangeListener from the listener list for a specific property.
172	void repaint() Repaints this component.
173	void repaint(int x,int y,int width,int height) Repaints the specified rectangle of this component.
174	void repaint(long tm) Repaints the component.
175	void repaint(long tm,int x,int y,int width,int height) Repaints the specified rectangle of this component within tm milliseconds.
176	void requestFocus() Requests that this Component get the input focus, and that this Component's top-level ancestor become the focused Window.
177	protected boolean requestFocus(boolean temporary) Requests that this Component get the input focus, and that this Component's top-level ancestor become the focused Window.
178	boolean requestFocusInWindow() Requests that this Component get the input focus, if this Component's top-level ancestor is already the focused Window.
179	protected boolean requestFocusInWindow(boolean temporary) Requests that this Component get the input focus, if this Component's top-level ancestor is already the focused Window.
180	void reshape(int x,int y,int width,int height) Deprecated. As of JDK version 1.1, replaced by setBounds(int, int, int, int).
181	void resize(Dimension d) Deprecated. As of JDK version 1.1, replaced by setSize(Dimension).
182	void resize(int width,int height) Deprecated. As of JDK version 1.1, replaced by setSize(int, int).
183	void setBackground(Color c) Sets the background color of this component.
184	void setBounds(int x,int y,int width,int height) Moves and resizes this component.
185	void setBounds(Rectangle r) Moves and resizes this component to conform to the new bounding rectangle r.
186	void setComponentOrientation(ComponentOrientation o) Sets the language-sensitive orientation that is to be used to order the elements or text within this component.
187	void setCursor(Cursor cursor) Sets the cursor image to the specified cursor.
188	void setDropTarget(DropTarget dt) Associate a DropTarget with this component.
189	void setEnabled(boolean b) Enables or disables this component, depending on the value of the parameter b.
190	void setFocusable(boolean focusable) Sets the focusable state of this Component to the specified value.
191	void setFocusTraversalKeys(int id, Set<? extends AWTKeyStroke> keystrokes) Sets the focus traversal keys for a given traversal operation for this Component.
192	void setFocusTraversalKeysEnabled(boolean focusTraversalKeysEnabled) Sets whether focus traversal keys are enabled for this Component.
193	void setFont(Font f) Sets the font of this component.
194	void setForeground(Color c) Sets the foreground color of this component.
195	void setIgnoreRepaint(boolean ignoreRepaint) Sets whether or not paint messages received from the operating system should be ignored.
196	void setLocale(Locale l) Sets the locale of this component.
197	void setLocation(int x,int y) Moves this component to a new location.
198	void setLocation(Point p) Moves this component to a new location.
199	void setMaximumSize(Dimension maximumSize) Sets the maximum size of this component to a constant value.
200	void setMinimumSize(Dimension minimumSize) Sets the minimum size of this component to a constant value.
201	void setName(String name) Sets the name of the component to the specified string.
202	void setPreferredSize(Dimension preferredSize) Sets the preferred size of this component to a constant value.
203	void setSize(Dimension d) Resizes this component so that it has width d.width and height d.height.
204	void setSize(int width,int height) Resizes this component so that it has width width and height height.
205	void setVisible(boolean b) Shows or hides this component depending on the value of parameter b.
206	void show() Deprecated. As of JDK version 1.1, replaced by setVisible(boolean).
207	void show(boolean b) Deprecated. As of JDK version 1.1, replaced by setVisible(boolean).
208	Dimension size() Deprecated. As of JDK version 1.1, replaced by getSize().
209	String toString() Returns a string representation of this component and its values.
210	void transferFocus() Transfers the focus to the next component, as though this Component were the focus owner.
211	void transferFocusBackward() Transfers the focus to the previous component, as though this Component were the focus owner.
212	void transferFocusUpCycle() Transfers the focus up one focus traversal cycle.
213	void update(Graphics g) Updates this component.
214	void validate() Ensures that this component has a valid layout.
215	Rectangle bounds() Deprecated. As of JDK version 1.1, replaced by getBounds().
216	protected AWTEvent coalesceEvents(AWTEvent existingEvent, AWTEvent newEvent) Potentially coalesce an event being posted with an existing event.
217	protected String paramString() Returns a string representing the state of this component.
218	protected void firePropertyChange(String propertyName,int oldValue,int newValue) Support for reporting bound property changes for integer properties.
219	Dimension preferredSize() Deprecated. As of JDK version 1.1, replaced by getPreferredSize().
220	boolean prepareImage(Image image, ImageObserver observer) Prepares an image for rendering on this component.
221	Dimension minimumSize() Deprecated. As of JDK version 1.1, replaced by getMinimumSize().

Methods inherited

This class inherits methods from the following classes:

java.lang.Object

AWT Label Class

Introduction

Label is a passive control because it does not create any event when accessed by the user. The label control is an object of Label. A label displays a single line of read-only text. However the text can be changed by the application programmer but cannot be changed by the end user in any way.

Class declaration

Following is the declaration for java.awt.Label class:

public class Label
   extends Component
      implements Accessible

Field

Following are the fields for java.awt.Component class:

static int CENTER -- Indicates that the label should be centered.
static int LEFT -- Indicates that the label should be left justified.
static int RIGHT -- Indicates that the label should be right justified.

Class constructors

S.N.	Constructor & Description
1	Label() Constructs an empty label.
2	Label(String text) Constructs a new label with the specified string of text, left justified.
3	Label(String text, int alignment) Constructs a new label that presents the specified string of text with the specified alignment.

Class methods

S.N.	Method & Description
1	void addNotify() Creates the peer for this label.
2	AccessibleContext getAccessibleContext() Gets the AccessibleContext associated with this Label.
3	int getAlignment() Gets the current alignment of this label.
4	String getText() Gets the text of this label.
5	protected String paramString() Returns a string representing the state of this Label.
6	void setAlignment(int alignment) Sets the alignment for this label to the specified alignment.
7	void setText(String text) Sets the text for this label to the specified text.

Methods inherited

This class inherits methods from the following classes:

java.awt.Component
java.lang.Object

Label Example

Create the following java program using any editor of your choice in say D:/ > AWT > com > tutorialspoint > gui >
AwtControlDemo.java

package com.tutorialspoint.gui;

import java.awt.*;
import java.awt.event.*;

public class AwtControlDemo {

   private Frame mainFrame;
   private Label headerLabel;
   private Label statusLabel;
   private Panel controlPanel;

   public AwtControlDemo(){
      prepareGUI();
   }

   public static void main(String[] args){
      AwtControlDemo  awtControlDemo = new AwtControlDemo();
      awtControlDemo.showLabelDemo();
   }

   private void prepareGUI(){
      mainFrame = new Frame("Java AWT Examples");
      mainFrame.setSize(400,400);
      mainFrame.setLayout(new GridLayout(3, 1));
      mainFrame.addWindowListener(new WindowAdapter() {
         public void windowClosing(WindowEvent windowEvent){
            System.exit(0);
         }        
      });    
      headerLabel = new Label();
      headerLabel.setAlignment(Label.CENTER);
      statusLabel = new Label();        
      statusLabel.setAlignment(Label.CENTER);
      statusLabel.setSize(350,100);

      controlPanel = new Panel();
      controlPanel.setLayout(new FlowLayout());

      mainFrame.add(headerLabel);
      mainFrame.add(controlPanel);
      mainFrame.add(statusLabel);
      mainFrame.setVisible(true);  
   }

   private void showLabelDemo(){
      headerLabel.setText("Control in action: Label");      

      Label label = new Label();
      label.setText("Welcome to TutorialsPoint AWT Tutorial.");
      label.setAlignment(Label.CENTER);
      label.setBackground(Color.GRAY);
      label.setForeground(Color.WHITE);
      controlPanel.add(label);
   
      mainFrame.setVisible(true);  
   }
}

Compile the program using command prompt. Go to D:/ > AWT and type the following command.

D:\AWT>javac com\tutorialspoint\gui\AwtControlDemo.java

If no error comes that means compilation is successful. Run the program using following command.

D:\AWT>java com.tutorialspoint.gui.AwtControlDemo

Verify the following output
AWT Label

AWT Button Class

Introduction

Button is a control component that has a label and generates an event when pressed. When a button is pressed and released, AWT sends an instance of ActionEvent to the button, by calling processEvent on the button. The button's processEvent method receives all events for the button; it passes an action event along by calling its own processActionEvent method. The latter method passes the action event on to any action listeners that have registered an interest in action events generated by this button.
If an application wants to perform some action based on a button being pressed and released, it should implement ActionListener and register the new listener to receive events from this button, by calling the button's addActionListener method. The application can make use of the button's action command as a messaging protocol.

Class declaration

Following is the declaration for java.awt.Button class:

public class Button
   extends Component
      implements Accessible

Class constructors

S.N.	Constructor & Description
1	Button() Constructs a button with an empty string for its label.
2	Button(String text) Constructs a new button with specified label.

Class methods

S.N.	Method & Description
1	void addActionListener(ActionListener l) Adds the specified action listener to receive action events from this button.
2	void addNotify() Creates the peer of the button.
3	AccessibleContext getAccessibleContext() Gets the AccessibleContext associated with this Button.
4	String getActionCommand() Returns the command name of the action event fired by this button.
5	ActionListener[] getActionListeners() Returns an array of all the action listeners registered on this button.
6	String getLabel() Gets the label of this button.
7	<T extends EventListener> T[] getListeners(Class<T> listenerType) Returns an array of all the objects currently registered as FooListeners upon this Button.
8	protected String paramString() Returns a string representing the state of this Button.
9	protected void processActionEvent(ActionEvent e) Processes action events occurring on this button by dispatching them to any registered ActionListener objects.
10	protected void processEvent(AWTEvent e) Processes events on this button.
11	void removeActionListener(ActionListener l) Removes the specified action listener so that it no longer receives action events from this button.
12	void setActionCommand(String command) Sets the command name for the action event fired by this button.
13	void setLabel(String label) Sets the button's label to be the specified string.

Methods inherited

This class inherits methods from the following classes:

java.awt.Component
java.lang.Object

Button Example

Create the following java program using any editor of your choice in say D:/ > AWT > com > tutorialspoint > gui >
AwtControlDemo.java

package com.tutorialspoint.gui;

import java.awt.*;
import java.awt.event.*;

public class AwtControlDemo {

   private Frame mainFrame;
   private Label headerLabel;
   private Label statusLabel;
   private Panel controlPanel;

   public AwtControlDemo(){
      prepareGUI();
   }

   public static void main(String[] args){
      AwtControlDemo  awtControlDemo = new AwtControlDemo();
      awtControlDemo.showButtonDemo();
   }

   private void prepareGUI(){
      mainFrame = new Frame("Java AWT Examples");
      mainFrame.setSize(400,400);
      mainFrame.setLayout(new GridLayout(3, 1));
      mainFrame.addWindowListener(new WindowAdapter() {
         public void windowClosing(WindowEvent windowEvent){
            System.exit(0);
         }        
      });    
      headerLabel = new Label();
      headerLabel.setAlignment(Label.CENTER);
      statusLabel = new Label();        
      statusLabel.setAlignment(Label.CENTER);
      statusLabel.setSize(350,100);

      controlPanel = new Panel();
      controlPanel.setLayout(new FlowLayout());

      mainFrame.add(headerLabel);
      mainFrame.add(controlPanel);
      mainFrame.add(statusLabel);
      mainFrame.setVisible(true);  
   }

   private void showButtonDemo(){
      headerLabel.setText("Control in action: Button"); 

      Button okButton = new Button("OK");
      Button submitButton = new Button("Submit");
      Button cancelButton = new Button("Cancel");

      okButton.addActionListener(new ActionListener() {
         public void actionPerformed(ActionEvent e) {
            statusLabel.setText("Ok Button clicked.");
         }
      });

      submitButton.addActionListener(new ActionListener() {
         public void actionPerformed(ActionEvent e) {
            statusLabel.setText("Submit Button clicked.");
         }
      });

      cancelButton.addActionListener(new ActionListener() {
         public void actionPerformed(ActionEvent e) {
            statusLabel.setText("Cancel Button clicked.");
         }
      });

      controlPanel.add(okButton);
      controlPanel.add(submitButton);
      controlPanel.add(cancelButton);       

      mainFrame.setVisible(true);  
   }
}

Compile the program using command prompt. Go to D:/ > AWT and type the following command.

D:\AWT>javac com\tutorialspoint\gui\AwtControlDemo.java

If no error comes that means compilation is successful. Run the program using following command.

D:\AWT>java com.tutorialspoint.gui.AwtControlDemo

Verify the following output
AWT Button

AWT CheckBox Class

Introduction

Checkbox control is used to turn an option on(true) or off(false). There is label for each checkbox representing what the checkbox does.The state of a checkbox can be changed by clicking on it.

Class declaration

Following is the declaration for java.awt.Checkbox class:

public class Checkbox
   extends Component
      implements ItemSelectable,Accessible

Class constructors

S.N.	Constructor & Description
1	Checkbox() Creates a check box with an empty string for its label.
2	Checkbox(String label) Creates a check box with the specified label.
3	Checkbox(String label, boolean state) Creates a check box with the specified label and sets the specified state.
4	Checkbox(String label, boolean state, CheckboxGroup group) Constructs a Checkbox with the specified label, set to the specified state, and in the specified check box group.
5	Checkbox(String label, CheckboxGroup group, boolean state) Creates a check box with the specified label, in the specified check box group, and set to the specified state.

Class methods

S.N.	Method & Description
1	void addItemListener(ItemListener l) Adds the specified item listener to receive item events from this check box.
2	void addNotify() Creates the peer of the Checkbox.
3	AccessibleContext getAccessibleContext() Gets the AccessibleContext associated with this Checkbox.
4	CheckboxGroup getCheckboxGroup() Determines this check box's group.
5	ItemListener[] getItemListeners() Returns an array of all the item listeners registered on this checkbox.
6	String getLabel() Gets the label of this check box.
7	<T extends EventListener>T[] getListeners(Class<T> listenerType) Returns an array of all the objects currently registered as FooListeners upon this Checkbox.
8	Object[] getSelectedObjects() Returns an array (length 1) containing the checkbox label or null if the checkbox is not selected.
9	boolean getState() Determines whether this check box is in the on or off state.
10	protected String paramString() Returns a string representing the state of this Checkbox.
11	protected void processEvent(AWTEvent e) Processes events on this check box.
12	protected void processItemEvent(ItemEvent e) Processes item events occurring on this check box by dispatching them to any registered ItemListener objects.
13	void removeItemListener(ItemListener l) Removes the specified item listener so that the item listener no longer receives item events from this check box.
14	void setCheckboxGroup(CheckboxGroup g) Sets this check box's group to the specified check box group.
15	void setLabel(String label) Sets this check box's label to be the string argument.
16	void setState(boolean state) Sets the state of this check box to the specified state.

Methods inherited

This class inherits methods from the following classes:

java.awt.Component
java.lang.Object

CheckBox Example

Create the following java program using any editor of your choice in say D:/ > AWT > com > tutorialspoint > gui >
AwtControlDemo.java

package com.tutorialspoint.gui;

import java.awt.*;
import java.awt.event.*;

public class AwtControlDemo {

   private Frame mainFrame;
   private Label headerLabel;
   private Label statusLabel;
   private Panel controlPanel;

   public AwtControlDemo(){
      prepareGUI();
   }

   public static void main(String[] args){
      AwtControlDemo  awtControlDemo = new AwtControlDemo();
      awtControlDemo.showCheckBoxDemo();
   }

   private void prepareGUI(){
      mainFrame = new Frame("Java AWT Examples");
      mainFrame.setSize(400,400);
      mainFrame.setLayout(new GridLayout(3, 1));
      mainFrame.addWindowListener(new WindowAdapter() {
         public void windowClosing(WindowEvent windowEvent){
            System.exit(0);
         }        
      });    
      headerLabel = new Label();
      headerLabel.setAlignment(Label.CENTER);
      statusLabel = new Label();        
      statusLabel.setAlignment(Label.CENTER);
      statusLabel.setSize(350,100);

      controlPanel = new Panel();
      controlPanel.setLayout(new FlowLayout());

      mainFrame.add(headerLabel);
      mainFrame.add(controlPanel);
      mainFrame.add(statusLabel);
      mainFrame.setVisible(true);  
   }

   private void showCheckBoxDemo(){

      headerLabel.setText("Control in action: CheckBox"); 

      Checkbox chkApple = new Checkbox("Apple");
      Checkbox chkMango = new Checkbox("Mango");
      Checkbox chkPeer = new Checkbox("Peer");


      chkApple.addItemListener(new ItemListener() {
         public void itemStateChanged(ItemEvent e) {             
            statusLabel.setText("Apple Checkbox: " 
            + (e.getStateChange()==1?"checked":"unchecked"));
         }
      });

      chkMango.addItemListener(new ItemListener() {
         public void itemStateChanged(ItemEvent e) {
            statusLabel.setText("Mango Checkbox: " 
            + (e.getStateChange()==1?"checked":"unchecked"));
         }
      });

      chkPeer.addItemListener(new ItemListener() {
         public void itemStateChanged(ItemEvent e) {
            statusLabel.setText("Peer Checkbox: " 
            + (e.getStateChange()==1?"checked":"unchecked"));
         }
      });

      controlPanel.add(chkApple);
      controlPanel.add(chkMango);
      controlPanel.add(chkPeer);       

      mainFrame.setVisible(true);  
   }
}

Compile the program using command prompt. Go to D:/ > AWT and type the following command.

D:\AWT>javac com\tutorialspoint\gui\AwtControlDemo.java

If no error comes that means compilation is successful. Run the program using following command.

D:\AWT>java com.tutorialspoint.gui.AwtControlDemo

Verify the following output

AWT CheckBoxGroup Class

Introduction

The CheckboxGroup class is used to group the set of checkbox.

Class declaration

Following is the declaration for java.awt.CheckboxGroup class:

public class CheckboxGroup
   extends Object
      implements Serializable

Class constructors

S.N.	Constructor & Description
1	CheckboxGroup() () Creates a new instance of CheckboxGroup.

Class methods

S.N.	Method & Description
1	Checkbox getCurrent() Deprecated. As of JDK version 1.1, replaced by getSelectedCheckbox().
2	Checkbox getSelectedCheckbox() Gets the current choice from this check box group.
3	void setCurrent(Checkbox box) Deprecated. As of JDK version 1.1, replaced by setSelectedCheckbox(Checkbox).
4	void setSelectedCheckbox(Checkbox box) Sets the currently selected check box in this group to be the specified check box.
5	String toString() Returns a string representation of this check box group, including the value of its current selection.

Methods inherited

This class inherits methods from the following classes:

java.lang.Object

CheckBoxGroup Example

Create the following java program using any editor of your choice in say D:/ > AWT > com > tutorialspoint > gui >
AwtControlDemo.java

package com.tutorialspoint.gui;

import java.awt.*;
import java.awt.event.*;

public class AwtControlDemo {

   private Frame mainFrame;
   private Label headerLabel;
   private Label statusLabel;
   private Panel controlPanel;

   public AwtControlDemo(){
      prepareGUI();
   }

   public static void main(String[] args){
      AwtControlDemo  awtControlDemo = new AwtControlDemo();
      awtControlDemo.showCheckBoxGroupDemo();
   }

   private void prepareGUI(){
      mainFrame = new Frame("Java AWT Examples");
      mainFrame.setSize(400,400);
      mainFrame.setLayout(new GridLayout(3, 1));
      mainFrame.addWindowListener(new WindowAdapter() {
         public void windowClosing(WindowEvent windowEvent){
            System.exit(0);
         }        
      });    
      headerLabel = new Label();
      headerLabel.setAlignment(Label.CENTER);
      statusLabel = new Label();        
      statusLabel.setAlignment(Label.CENTER);
      statusLabel.setSize(350,100);

      controlPanel = new Panel();
      controlPanel.setLayout(new FlowLayout());

      mainFrame.add(headerLabel);
      mainFrame.add(controlPanel);
      mainFrame.add(statusLabel);
      mainFrame.setVisible(true);  
   }

   private void showCheckBoxGroupDemo(){
    
      headerLabel.setText("Control in action: CheckBoxGroup"); 

      CheckboxGroup fruitGroup = new CheckboxGroup();

      Checkbox chkApple = new Checkbox("Apple",fruitGroup,true);
      Checkbox chkMango = new Checkbox("Mango",fruitGroup,false);
      Checkbox chkPeer = new Checkbox("Peer",fruitGroup,false);

      statusLabel.setText("Apple Checkbox: checked");
      chkApple.addItemListener(new ItemListener() {
         public void itemStateChanged(ItemEvent e) {             
            statusLabel.setText("Apple Checkbox: checked");
         }
      });

      chkMango.addItemListener(new ItemListener() {
         public void itemStateChanged(ItemEvent e) {
            statusLabel.setText("Mango Checkbox: checked");
         }
      });

      chkPeer.addItemListener(new ItemListener() {
         public void itemStateChanged(ItemEvent e) {
            statusLabel.setText("Peer Checkbox: checked");
         }
      });

      controlPanel.add(chkApple);
      controlPanel.add(chkMango);   
      controlPanel.add(chkPeer);       

      mainFrame.setVisible(true);  
   }
}

Compile the program using command prompt. Go to D:/ > AWT and type the following command.

D:\AWT>javac com\tutorialspoint\gui\AwtControlDemo.java

If no error comes that means compilation is successful. Run the program using following command.

D:\AWT>java com.tutorialspoint.gui.AwtControlDemo

Verify the following output
AWT CheckBoxGroup

AWT List Class

Introduction

The List represents a list of text items. The list can be configured to that user can choose either one item or multiple items.

Class declaration

Following is the declaration for java.awt.List class:

public class List
   extends Component
      implements ItemSelectable, Accessible

Class constructors

S.N.	Constructor & Description
1	List() Creates a new scrolling list.
2	List(int rows) Creates a new scrolling list initialized with the specified number of visible lines.
3	List(int rows, boolean multipleMode) Creates a new scrolling list initialized to display the specified number of rows.

Class methods

<T extends EventListener> T[] getListeners(Class<T> listenerType)
Returns an array of all the objects currently registered as FooListeners upon this List.

S.N.	Method & Description
1	void add(String item) Adds the specified item to the end of scrolling list.
2	void add(String item, int index) Adds the specified item to the the scrolling list at the position indicated by the index.
3	void addActionListener(ActionListener l) Adds the specified action listener to receive action events from this list.
4	void addItem(String item) Deprecated. replaced by add(String).
5	void addItem(String item, int index) Deprecated. replaced by add(String, int).
6	void addItemListener(ItemListener l) Adds the specified item listener to receive item events from this list.
7	void addNotify() Creates the peer for the list.
8	boolean allowsMultipleSelections() Deprecated. As of JDK version 1.1, replaced by isMultipleMode().
9	void clear() Deprecated. As of JDK version 1.1, replaced by removeAll().
10	int countItems() Deprecated. As of JDK version 1.1, replaced by getItemCount().
11	void delItem(int position) Deprecated. replaced by remove(String) and remove(int).
12	void delItems(int start, int end) Deprecated. As of JDK version 1.1, Not for public use in the future. This method is expected to be retained only as a package private method.
13	void deselect(int index) Deselects the item at the specified index.
14	AccessibleContext getAccessibleContext() Gets the AccessibleContext associated with this List.
15	ActionListener[] getActionListeners() Returns an array of all the action listeners registered on this list.
16	String getItem(int index) Gets the item associated with the specified index.
17	int getItemCount() Gets the number of items in the list.
18	ItemListener[] getItemListeners() Returns an array of all the item listeners registered on this list.
19	String[] getItems() Gets the items in the list.
20	Dimension getMinimumSize() Determines the minimum size of this scrolling list.
21	Dimension getMinimumSize(int rows) Gets the minumum dimensions for a list with the specified number of rows.
22	Dimension getPreferredSize() Gets the preferred size of this scrolling list.
23	Dimension getPreferredSize(int rows) Gets the preferred dimensions for a list with the specified number of rows.
24	int getRows() Gets the number of visible lines in this list.
25	int getSelectedIndex() Gets the index of the selected item on the list,
26	int[] getSelectedIndexes() Gets the selected indexes on the list.
27	String getSelectedItem() Gets the selected item on this scrolling list.
28	String[] getSelectedItems() Gets the selected items on this scrolling list.
29	Object[] getSelectedObjects() Gets the selected items on this scrolling list in an array of Objects.
30	int getVisibleIndex() Gets the index of the item that was last made visible by the method makeVisible.
31	boolean isIndexSelected(int index) Determines if the specified item in this scrolling list is selected.
32	boolean isMultipleMode() Determines whether this list allows multiple selections.
33	boolean isSelected(int index) Deprecated. As of JDK version 1.1, replaced by isIndexSelected(int).
34	void makeVisible(int index) Makes the item at the specified index visible.
35	Dimension minimumSize() Deprecated. As of JDK version 1.1, replaced by getMinimumSize().
36	Dimension minimumSize(int rows) Deprecated. As of JDK version 1.1, replaced by getMinimumSize(int).
37	protected String paramString() Returns the parameter string representing the state of this scrolling list.
38	Dimension preferredSize() Deprecated. As of JDK version 1.1, replaced by getPreferredSize().
39	Dimension preferredSize(int rows) Deprecated. As of JDK version 1.1, replaced by getPreferredSize(int).
40	protected void processActionEvent(ActionEvent e) Processes action events occurring on this component by dispatching them to any registered ActionListener objects.
41	protected void processEvent(AWTEvent e) Processes events on this scrolling list.
42	protected void processItemEvent(ItemEvent e) Processes item events occurring on this list by dispatching them to any registered ItemListener objects.
43	void remove(int position) Removes the item at the specified position from this scrolling list.
44	void remove(String item) Removes the first occurrence of an item from the list.
45	void removeActionListener(ActionListener l) Removes the specified action listener so that it no longer receives action events from this list.
46	void removeAll() Removes all items from this list.
47	void removeItemListener(ItemListener l) Removes the specified item listener so that it no longer receives item events from this list.
48	void removeNotify() Removes the peer for this list.
49	void replaceItem(String newValue, int index) Replaces the item at the specified index in the scrolling list with the new string.
50	void select(int index) Selects the item at the specified index in the scrolling list.
51	void setMultipleMode(boolean b) Sets the flag that determines whether this list allows multiple selections.
52	void setMultipleSelections(boolean b) Deprecated. As of JDK version 1.1, replaced by setMultipleMode(boolean).

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Wednesday 17 September 2014

Java Awt Quick Guide 1

Graphical User Interface

Basic Terminologies

Examples of GUI based Applications

Advantages of GUI over CUI

Environment Setup

Setting up the path for windows 2000/XP:

Setting up the path for windows 95/98/ME:

Setting up the path for Linux, UNIX, Solaris, FreeBSD:

Popular Java Editors:

AWT Controls

AWT Component Class

Introduction

Class declaration

Field

Class constructors

Class methods

Methods inherited

AWT Label Class

Introduction

Class declaration

Field

Class constructors

Class methods

Methods inherited

Label Example

AWT Button Class

Introduction

Class declaration

Class constructors

Class methods

Methods inherited

Button Example

AWT CheckBox Class

Introduction

Class declaration

Class constructors

Class methods

Methods inherited

CheckBox Example

AWT CheckBoxGroup Class

Introduction

Class declaration

Class constructors

Class methods

Methods inherited

CheckBoxGroup Example

AWT List Class

Introduction

Class declaration

Class constructors

Class methods

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