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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.javapackage 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