import java.awt.Button;
import java.awt.Color;
import java.awt.FlowLayout;
import java.awt.Frame;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import java.awt.event.WindowListener;
import java.io.IOException;

import javax.swing.JButton;

/*作者：wangcx
*日期：2019年6月10日
*时间：下午6:35:12
*/
public class GUI123 implements ActionListener {
 private Frame f;
 private  Button redbtu,greenbtu,bluebtu,resetbtu;
 JButton btu;
     public GUI123() {
        f=new Frame("红绿蓝");
        redbtu=new Button("红色");
        greenbtu=new Button("绿色");
        bluebtu=new Button("蓝色");
        resetbtu=new Button("JB");
        //btu.setToolTipText("登录到服务器");//设置组件提示信息
       
        f.add(redbtu);
        f.add(greenbtu);
        f.add(bluebtu);
        f.add(resetbtu);
       
        f.setBounds(400, 200, 400, 400);
        f.setLayout(new FlowLayout());
        f.setVisible(true);
       
        redbtu.addActionListener(this);
        greenbtu.addActionListener(this);
        bluebtu.addActionListener(this);
        resetbtu.addActionListener(this);

       
        redbtu.addMouseListener(new MouseAdapter() {
        
         public void mouseClicked(MouseEvent e) {
        
          if(e.getClickCount()==2) {
         
          
           redbtu.setBackground(Color.BLUE);
           f.setBackground(Color.BLUE);
           System.out.println("123双击！");
          }
         }
        
   });
       
       
        greenbtu.addMouseListener(new MouseAdapter() {
         public void mouseExited(MouseEvent e) {
      // TODO Auto-generated method stub
          f.setBackground(Color.white);
          System.out.println("鼠标退出");
     }
         public void mousePressed(MouseEvent e) {
      // TODO Auto-generated method stub
          f.setBackground(Color.GREEN);
      System.out.println("鼠标按下");
     }
         public void mouseEntered(MouseEvent e) {
         // TODO Auto-generated method stub
          System.out.println("鼠标进入");
         f.setBackground(Color.yellow);
         
        }
   });
     
     
   
       
              f.addWindowListener(new WindowAdapter() {
               public void windowClosing(WindowEvent w) {
                f.dispose();
               
               }
   });
             
              redbtu.addMouseListener(new MouseAdapter() {
              
   });
             
     }
 
 
 public static void main(String[] args) throws IOException {
  // TODO Auto-generated method stub
         
   new GUI123();
      
 }
 
   
 @Override
 public void actionPerformed(ActionEvent w) {
  // TODO Auto-generated method stub
  //有两种办法
  Object obj1=w.getActionCommand();//获取的是String 中的标签文字
  Object obj=w.getSource();//获取的是组件对象
  
  if(obj1 =="红色") {
   f.setBackground(Color.RED);
   
  }
  
    if(obj ==redbtu) {
     f.setBackground(Color.RED);
     
    }
 }

}