Ajouter un Action listener à un menu

import java.awt.BorderLayout; 
import java.awt.Color;
import java.awt.Graphics; 
import java.awt.Image; 
import java.awt.Menu;
import java.awt.MenuBar;
import java.awt.MenuItem;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.JFrame; 
import javax.swing.JOptionPane;
import javax.swing.JPanel; 
import javax.swing.text.AbstractDocument.Content;

import skillmetre.Skill;
import views.MaFenetre;
import Frame.Window;

class Inter extends JFrame implements ActionListener 
{  
	private static final long serialVersionUID = 1L;
	public MenuBar mu;
	public Menu option2,option1,b2;
	public MenuItem a1,a2,a3,a4,b1,b21,b22;
	
	
	
Inter() 
{ 
setSize(600, 600); 
setTitle("jeux");
this.setBackground(Color.WHITE);
this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); //On dit à l'application de se fermer lors du clic sur la croix
setContentPane(new AfficheImage("images/Les-jeu.png")); 
getContentPane().setLayout(new BorderLayout()); 
this.setVisible(true); 

//super();
		mu=new MenuBar();
	    this.setMenuBar(mu);
	    
	 
		option1 =new Menu("choisir un jeu");
		
		
		
		
		
		
		
	
		
		mu.add(option1);
		
	
				
		
		a1=new MenuItem("SkillMetre");
		a2=new MenuItem("Demineur");
		a3=new MenuItem("Paint");
		a4=new MenuItem("A4");
		a1.addActionListener(this);
		a2.addActionListener(this);
		a3.addActionListener(this);
		a4.addActionListener(this);
		
		
		option1.add(a1);
		option1.add(a2);
		option1.add(a3);
		
		
	
		option2 =new Menu("Aide");
		option2.addActionListener(this);
		
	
		
		mu.add(option2);
		
	
}

@Override
public void actionPerformed(ActionEvent e) {
	// TODO Auto-generated method stub*
	if (e.getSource()==option2)
	{  
		
		System.out.println("hhhhhh");
		
	}
	
	else if (e.getSource()==a1)
	{
		Skill s= new Skill();
		s.setVisible(true);
		
		
	}
	
	else if (e.getSource()==a3)
	{
		Window w= new Window();
		w.setVisible(true);
			
		
		
	}
	else if (e.getSource()==a2 )
	{
		 
		 MaFenetre f = new MaFenetre();
		   f.setVisible(true);
			 
		
		
	}
	 




	
} 


class AfficheImage extends JPanel 
{ 
Image eau; 

AfficheImage(String s) 
{ 
eau = getToolkit().getImage(s); 

} 

public void paintComponent(Graphics g) 
{ 
super.paintComponent(g); 
g.drawImage(eau, 0, 0, getWidth(), getHeight(), this); 
} 


} 

public static void main(String[] args) 
{ 
Inter test = new Inter(); 
} }