package 多个按钮;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class Frame1 extends JFrame implements ActionListener {
JButton button;
JButton str;
JButton st;
JButton su;
JButton h1;
JButton h2;
Frame2 frame;
public Frame1(){
setTitle("控制系统开关");
button=new JButton("电风扇");
str=new JButton("空调");
st=new JButton("电脑");
su=new JButton("手机");
h1=new JButton("遥控器");
h2=new JButton("插座");
button.addActionListener(this);
str.addActionListener(this);
st.addActionListener(this);
su.addActionListener(this);
h1.addActionListener(this);
h2.addActionListener(this);
this.setSize(300,100);
this.add(button);
this.add(str);
this.add(st);
this.add(su);
this.add(h1);
this.add(h2);
this.setLayout(new FlowLayout());
this.setVisible(true);

}
public void actionPerformed(ActionEvent e)
{
if(e.getSource()==button)
{
frame=new Frame2();
}
else if(e.getSource()==str){
frame=new Frame2();
}
else if(e.getSource()==st){
frame=new Frame2();
}
else if(e.getSource()==su){
frame=new Frame2();
}
else if(e.getSource()==h1){
frame=new Frame2();
}
else if(e.getSource()==h2){
frame=new Frame2();
}
}
public static void main(String[] args) {
new Frame1();
}

}

package 多个按钮;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class Frame2 extends JFrame implements ActionListener{
JButton a;
JButton b;
public Frame2(){
setTitle("控制器");
this.setSize(300,100);
this.setLayout(new FlowLayout());
this.setVisible(true);
a=new JButton("开");
b=new JButton("关");
a.addActionListener(this);
b.addActionListener(this);
this.add(a);
this.add(b);
}
public void actionPerformed(ActionEvent e) {

}

}


怎么把start（）和stop（）方法写到里面去啊？各位大神！