How to Use KeyEventDispatcher() with Multiple JFrames Easily

I have  to tell that this is the easiest trick I found so far to dealing with multiple JFrames with Keyboard inputs.(Eg:- Closing a JFrame using ESC button )

Scenario: closing the JFrame "Invoice" by pressing ESC and go to another JFrame "Main_menue".

1) First of all you have to import few things as follows

import java.awt.KeyEventDispatcher;
import java.awt.KeyboardFocusManager;
import java.awt.event.KeyEvent;

 2) Then Implement your JFrame class to KeyEventDispatcher(used class name is "Invoice")

public class Invoice extends javax.swing.JFrame implements KeyEventDispatcher {

3) (Step  3 & 4 make sure to do in JFrame class u want to close) Then you have to Override the method "public boolean dispatchKeyEvent(KeyEvent e) " of  KeyEventDispatcher, as follows.

        @Override
        public boolean dispatchKeyEvent(KeyEvent e)
{
       
            if (e.getID()== KeyEvent.KEY_PRESSED)
        {
                System.out.println("Pressed key From Invoice: "+e.getKeyCode());

              if(e.getKeyCode()==KeyEvent.VK_ESCAPE)
             {

                int y= JOptionPane.showConfirmDialog(rootPane,
                 "Do You want to Exit from Invoice? ","Message", JOptionPane.YES_NO_OPTION);
               
                 if (y==JOptionPane.YES_OPTION)
                      {
                        removemanager(); //remove KeyEventDispatcher
                        new Main_menue().setVisible(true);
                       dispose();
                      }
             }

         }
else if (e.getID() == KeyEvent.KEY_RELEASED) {
           System.out.println("2test2");  //not important(Situational)
            } else if (e.getID() == KeyEvent.KEY_TYPED) {
              System.out.println("3test3"); //not important(Situational)
            }
            return false;
        }


4) Then create two methods to add & remove the KeyEventDispatcher from KeyBoardFocusManager


public void addmanager()
{
KeyboardFocusManager manager1 = KeyboardFocusManager.getCurrentKeyboardFocusManager();
manager1.addKeyEventDispatcher(this);
}

     public void removemanager()
 {
KeyboardFocusManager manager2 = KeyboardFocusManager.getCurrentKeyboardFocusManager();
manager2.removeKeyEventDispatcher(this);
  }

5) In the Constructor of JFrame call the addmanager()

 Invoice()
 {
        initComponents();
         setExtendedState(MAXIMIZED_BOTH);
    //add the KeyEventDispatcher to KeyBoardFocusManager as follows
          addmanager();
 }

IMPORTANT:  Make sure to call removemanager() when u closing a JFrame, if didn't there will be two KeyeventDispatcher's currently running . which will cause you some troubles.

(Make sure to contact me if have any trouble regarding this post,GOOD LUCK)