java 如何将按钮事件改成鼠标事件监听器

请求各位大神，关于下面这个简单计算器，如何对按钮实现鼠标监听，想不通鼠标监听和按钮监听有什么区别

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

class Guide extends JFrame implements ActionListener
{
    private JLabel lab1,lab2,lab3;
    private JTextField text1,text2,text3;
    private JRadioButton radio1,radio2,radio3,radio4;

    private JButton button1,button2;
    private JPanel pane1,pane2,pane3;

    public Guide()
    {
        setTitle("简单的算术计算");//标题
        setSize(560,150);//界面大小 
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);//关闭界面
        setResizable(true);

         lab1=new JLabel("操作数1：");
         lab2=new JLabel("操作数2：");
         lab3=new JLabel("计算结果：");
         text1=new JTextField(20);
         text2=new JTextField(20);
         text3=new JTextField(20);
         radio1=new JRadioButton("+");  
         radio1.setSelected(true);//默认按钮1选中
         radio2=new JRadioButton("-");
         radio3=new JRadioButton("*");
         radio4=new JRadioButton("/");
         button1=new JButton("计算");
         button1.setForeground(Color.red);//字体颜色
         button1.setBackground(Color.yellow);
         button2=new JButton("清除");
         button2.setForeground(Color.red);//字体颜色
         button2.setBackground(Color.yellow);
         pane1=new JPanel();
         pane2=new JPanel();
         pane3=new JPanel();
         pane1.add(lab1);pane1.add(text1);
         pane1.add(lab2);pane1.add(text2);
         ButtonGroup group=new ButtonGroup();
         group.add(radio1); group.add(radio2); 
         group.add(radio3); group.add(radio4);

         pane2.setLayout(new FlowLayout(FlowLayout.CENTER,5,5));
         pane2.add(radio1);pane2.add(radio2);
         pane2.add(radio3);pane2.add(radio4);

         pane3.add(lab3);pane3.add(text3);
         pane3.add(button1);pane3.add(button2);

         add(pane1,BorderLayout.NORTH);
         add(pane2,BorderLayout.CENTER);
         add(pane3,BorderLayout.SOUTH);//布局

        button1.addActionListener(this);
        button2.addActionListener(this);//将按钮添加到事件监听器
        setVisible(true);//显示
    }
    public void actionPerformed(ActionEvent e)
    {
       double x,y,z=0;
       String s;
       x=Double.parseDouble(text1.getText());
       y=Double.parseDouble(text2.getText());

        JButton but=(JButton)e.getSource(); //获取事件源
       if(but.getText()=="计算")
       {
         if(radio1.isSelected()==true)
           {
            z=x+y;
            s=Double.toString(z);
            text3.setText(s);//将结果添加到文本框中
           }
          if(radio2.isSelected()==true)
           {
            z=x-y;
            s=Double.toString(z);
            text3.setText(s);//将结果添加到文本框中
           }
           if(radio3.isSelected()==true)
           {
            z=x*y;
            s=Double.toString(z);
            text3.setText(s);//将结果添加到文本框中
           }
           if(radio4.isSelected()==true)
           {//需要异常判断处理
               if(y==0){
                  text3.setText("除数不能为0！");
               }
               else {
                   z=x/y;
                   s=Double.toString(z);
                   text3.setText(s);//将结果添加到文本框中
              }    
           }
       }

       if(but.getText()=="清除")//清除
       {
         text1.setText(null);
         text2.setText(null);
         text3.setText(null);
       }
    }

public static void main(String args[])
    {
      new Guide();

    }
}

自己解决啦：

 //filename:Count.java
//计算器@鼠标事件
import java.awt.*;
import javax.swing.*;
import java.awt.event.*;

class Count extends JFrame //implements MouseListener
{
    static JLabel lab1,lab2,lab3;
    static JTextField text1,text2,text3;
    static JRadioButton radio1,radio2,radio3,radio4;

    static JButton button1,button2;
    static JPanel pane1,pane2,pane3;

    public static void main(String args[])
    {
        Count c=new Count();
        c.setTitle("简单的算术计算");//标题
        c.setSize(560,150);//界面大小   
        c.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);//关闭界面
        c.setResizable(true);

         lab1=new JLabel("操作数1：");
         lab2=new JLabel("操作数2：");
         lab3=new JLabel("计算结果：");
         text1=new JTextField(20);
         text2=new JTextField(20);
         text3=new JTextField(20);
         radio1=new JRadioButton("+");  
         radio1.setSelected(true);//默认按钮1选中
         radio2=new JRadioButton("-");
         radio3=new JRadioButton("*");
         radio4=new JRadioButton("/");
         button1=new JButton("计算");
         button1.setForeground(Color.red);//字体颜色
         button1.setBackground(Color.yellow);
         button2=new JButton("清除");
         button2.setForeground(Color.red);//字体颜色
         button2.setBackground(Color.yellow);
         pane1=new JPanel();
         pane2=new JPanel();
         pane3=new JPanel();
         pane1.add(lab1);pane1.add(text1);
         pane1.add(lab2);pane1.add(text2);
         ButtonGroup group=new ButtonGroup();
         group.add(radio1); group.add(radio2); 
         group.add(radio3); group.add(radio4);

         pane2.setLayout(new FlowLayout(FlowLayout.CENTER,5,5));//流式布局
         pane2.add(radio1);pane2.add(radio2);
         pane2.add(radio3);pane2.add(radio4);

         pane3.add(lab3);pane3.add(text3);
         pane3.add(button1);pane3.add(button2);

         c.add(pane1,BorderLayout.NORTH);
         c.add(pane2,BorderLayout.CENTER);
         c.add(pane3,BorderLayout.SOUTH);//布局

        button1.addMouseListener(new MyMouseList());//设置坚听者
        button2.addMouseListener(new ClearMouseList());//设置监听者
         c.setVisible(true);//显示
    }
      static class MyMouseList extends MouseAdapter
    {
        public void mouseClicked(MouseEvent e)//单击鼠标按钮时发生
        {
            double x,y,z=0;
            String s;
             x=Double.parseDouble(text1.getText());
             y=Double.parseDouble(text2.getText());
             if(radio1.isSelected()==true)
            {
                 z=x+y;
                s=Double.toString(z);
                text3.setText(s);//将结果添加到文本框中
            }
            if(radio2.isSelected()==true)
            {
                z=x-y;
                s=Double.toString(z);
                text3.setText(s);//将结果添加到文本框中
             }
            if(radio3.isSelected()==true)
            {
                z=x*y;
                s=Double.toString(z);
                text3.setText(s);//将结果添加到文本框中
            }
            if(radio4.isSelected()==true)
             {//需要异常判断处理
                if(y==0)
                 {
                  text3.setText("除数不能为0！");
                 }
                else 
                 {
                   z=x/y;
                   s=Double.toString(z);
                   text3.setText(s);//将结果添加到文本框中
                 }     
             }
        }
    }

    static class ClearMouseList extends MouseAdapter//清除
    {
        public void mouseClicked(MouseEvent e)
        { 
                text1.setText(null);
                text2.setText(null);
                text3.setText(null);        
        }    
    }
}