// GUI Constructor
 {
   ....

   actions()
 }


public void actions(){
     
      	Button1.addActionListener(new ActionListener(){
        	public void actionPerformed(ActionEvent ev){
          		Button_1_action(ev);
        	}
      	});
	
      	Button2.addActionListener(new ActionListener(){
        	public void actionPerformed(ActionEvent ev){
          		Button_2_action(ev);
        	}
      	});
}


public void Button_1_action(ActionEvent ev){
 ....
}

public void Button_2_action(ActionEvent ev){
 ....
}