Evento no applet

import javax.swing.*;   
import java.awt.*;  
import java.awt.Color;  
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;


public class Oscontent extends JApplet   
    {   
        private JButton botao;  
        private JPanel painel;  
        private JLabel label;  
        private JLabel vermelho;  
        private JLabel verde;  
        private JLabel azul;  
        private JTextField cor1;  
        private JTextField cor2;  
        private JTextField cor3;  
                int vm,vr,az;  
            
     
        

        public void init()   
        {  
            Container areaUtil = this.getContentPane();  
            FlowLayout aparencia =  new FlowLayout();  
            areaUtil.setLayout(aparencia); 
            painel = new JPanel();     
            botao =new JButton("CORES");  
            label =new JLabel("Bem-vindo ao mundo Java, " );  
            vermelho =new JLabel("Vermelho" );  
            verde =new JLabel("Verde" );  
            azul =new JLabel("Azul" );  
            cor1 = new JTextField("255");  
            cor2 = new JTextField("255");  
            cor3 = new JTextField("255");  
            areaUtil.add( painel );  
            painel.setBackground( new java.awt.Color(255, 100, 255));  
            painel.setLayout(aparencia);  
            vermelho.setForeground(Color.red);  
            verde.setForeground(Color.green);  
            azul.setForeground(Color.blue);  
  
           
            painel.add(botao);  
            painel.add(label);  
            painel.add(vermelho);  
            painel.add(cor1);  
            painel.add(verde);  
            painel.add(cor2);  
            painel.add(azul);  
            painel.add(cor3); 
            
            
           //ActionEvent para o botao 
            botao.addActionListener(new ActionListener() {
                public void actionPerformed(ActionEvent evt) {
                    Action(evt);
                }
           }); 

        }  
          
        public boolean Action(ActionEvent evt)  
        {  
  
            vm = Integer.valueOf(cor1.getText());  
            vr = Integer.valueOf(cor2.getText());  
            az = Integer.valueOf(cor3.getText());  
            painel.setBackground(new java.awt.Color(vm,vr,az));  
  
            painel.repaint();  
            return true;  
        }  
          
          
    }