Determining the Opposite Component of a Focus Event : Focus Event « Event « Java

1. Java
2. Event
3. Focus Event

Determining the Opposite Component of a Focus Event

  
import java.awt.Component;
import java.awt.event.FocusAdapter;
import java.awt.event.FocusEvent;

import javax.swing.JButton;
import javax.swing.JFrame;

public class Main {
  public static void main(String[] argv) throws Exception {
    JButton component = new JButton("a");
    component.addFocusListener(new MyFocusListener());

    JFrame f = new JFrame();
    f.add(component);
    f.pack();
    f.setVisible(true);

  }
}

class MyFocusListener extends FocusAdapter {
  public void focusGained(FocusEvent evt) {

    Component c = evt.getOppositeComponent();
    System.out.println(c.getName());
  }

  public void focusLost(FocusEvent evt) {

    Component c = evt.getOppositeComponent();
    System.out.println(c.getName() + "Opposite Component");
  }
}  

   
    
  

Related examples in the same category