Java Example Program / Sample Source Code
import java.awt.BorderLayout;
import java.awt.Checkbox;
import java.awt.Frame;
import java.awt.event.ItemEvent;
import java.awt.event.ItemListener;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import javax.swing.JOptionPane;
class ItemListenerExample {
public static void main(String args[]) {
Frame frame = new Frame("ItemListenerExample");
final Checkbox checkbox = new Checkbox("Checkbox 1");
frame.add(checkbox, BorderLayout.NORTH);
frame.pack();
frame.setVisible(true);
checkbox.addItemListener(new ItemListener() {
@Override
public void itemStateChanged(ItemEvent ie) {
if (checkbox.getState() == true) {
JOptionPane.showMessageDialog(null, "checkbox is checked");
} else {
JOptionPane
.showMessageDialog(null, "checkbox is unchecked");
}
}
});
frame.addWindowListener(new WindowAdapter() {
public void windowClosing(WindowEvent e) {
System.exit(0);
}
});
}
} |
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