import java.awt.*;
import java.awt.event.*;
import javax.swing.*;

public class AL extends JFrame implements ActionListener {
	public JMenuBar menuBar;
	public JMenu fileMenu, helpMenu;
	public JMenuItem newAction, exitAction, tombolAction;
	
	public AL() {
		menuBar = new JMenuBar();
    	setJMenuBar(menuBar);
    	
    	fileMenu = new JMenu("File");
        menuBar.add(fileMenu);
        
        newAction = new JMenuItem("New");
        exitAction = new JMenuItem("Exit");
        fileMenu.add(newAction);
        fileMenu.addSeparator();
        fileMenu.add(exitAction);
        
        newAction.addActionListener(this);
        exitAction.addActionListener(this);
        
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setSize(300, 300);
        setLocationRelativeTo(null);
        setTitle("Save The Villages");
        setResizable(false);
        setVisible(true);    
	}
	
	public void actionPerformed(ActionEvent event) {
		if(event.getSource()==newAction) {
			System.out.println("You have clicked on the new action");
			add(new AL_test());
		}
		if(event.getSource()==exitAction) {
			System.exit(0);
		}
	}
	
	public static void main(String[] args) {
        new AL();
    }
}

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;

public class AL_test extends JPanel implements ActionListener {
	JButton btn1 = new JButton();
	
	public AL_test() {
		btn1 = new JButton("baru");
		add(btn1);
		btn1.addActionListener(this); 
	}
	
	public void actionPerformed(ActionEvent event) {
		if(event.getSource()==btn1) {
			System.out.println("You have clicked on button");
		}
	}
}

public AL_test() {
	btn1 = new JButton("baru");
	add(btn1);
	btn1.addActionListener(this); 
	KeyListener listener = new KeyListener() {
		public void keyPressed(KeyEvent e) {
			int key = e.getKeyCode();
      			if (key == KeyEvent.VK_SPACE) {
            				System.out.println("You have clicked on SPACE");
	        		}
      		}
		public void keyReleased(KeyEvent e) {}
		public void keyTyped(KeyEvent e) {}
	};
	addKeyListener(listener);
}