Java Swing Tutorial - Java WindowEvent.getOldState()

Syntax

WindowEvent.getOldState() has the following syntax.

public int getOldState()

Example

In the following code shows how to use WindowEvent.getOldState() method.

/*from   ww  w .ja va 2s .  co  m*/
import java.awt.event.WindowEvent;

import javax.swing.JFrame;

public class Main extends JFrame {
  public Main() {

    setDefaultCloseOperation(EXIT_ON_CLOSE);
    enableEvents(java.awt.AWTEvent.WINDOW_EVENT_MASK);
  }

  protected void processWindowEvent(WindowEvent e) {
    System.out.println(e.getOldState()==WindowEvent.WINDOW_ACTIVATED);
    super.processWindowEvent(e); // Pass on the event
  }

  public static void main(String[] a) {
    Main window = new Main();
    window.setBounds(30, 30, 300, 300);
    window.setVisible(true);
  }
}