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服务器之家 - 编程语言 - JAVA教程 - java中Swing会奔跑的线程侠

java中Swing会奔跑的线程侠

2021-04-08 14:39彬菌 JAVA教程

本文通过代码示例给大家详细讲解了java中Swing会奔跑的线程侠这个经典的示例,有兴趣的朋友学习下。

实现效果:

java中Swing会奔跑的线程侠

奔溃的线程侠:(单线程)

主线程正在处理刷新图片的请求时,无法再接受其他请求,从而陷入阻塞的死循环状态。

绘制图片

java" id="highlighter_378519">
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import java.awt.Graphics;
import java.awt.Image;
import java.awt.Toolkit;
 
import javax.swing.JPanel;
 
public class CartonPerson extends JPanel implements Runnable{
    Image img[]=new Image[6];
    int index=0;
    int speed;
    public CartonPerson(int speed){
        this.speed=speed;
        img[0]=Toolkit.getDefaultToolkit().getImage("1.png");
        img[1]=Toolkit.getDefaultToolkit().getImage("2.png");
        img[2]=Toolkit.getDefaultToolkit().getImage("3.png");
        img[3]=Toolkit.getDefaultToolkit().getImage("4.png");
        img[4]=Toolkit.getDefaultToolkit().getImage("5.png");
        img[5]=Toolkit.getDefaultToolkit().getImage("6.png");
    }
    public void run(){
        while(true){
            try{
                repaint();
                Thread.sleep(100);
            }
            catch(InterruptedException e){
                e.printStackTrace();
            }
        }
    }
    @Override
    public void paintComponent(Graphics g) {
        // TODO Auto-generated method stub
        super.paintComponent(g);
        g.drawImage(img[index], 0, 0, getWidth(), getHeight(), this);
//      System.out.println(index);
        if(index==5){
            index=0;
        }
        else{
            index++;
        }
    }
}

单线程的窗体布局

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import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
 
import javax.swing.JButton;
import javax.swing.JFrame;
 
 
public class SingleThreadCarton extends JFrame{
    CartonPerson p1;
    JButton bstart=new JButton("开始");
    JButton bpause=new JButton("稍等");
    JButton bresume=new JButton("继续");
    SingleThreadCarton(){
        init();
        this.setTitle("奔溃的线程侠");
        this.setSize(600, 500);
        this.setResizable(true);
        this.setLocationRelativeTo(null);
        this.setDefaultCloseOperation(EXIT_ON_CLOSE);
        this.setVisible(true);
    }
    void init(){
        this.setLayout(null);
        p1=new CartonPerson(0);
        p1.setBounds(260, 100, 80, 160);
        bstart.setBounds(260,280, 80, 30);
        bpause.setBounds(260, 320, 80, 30);
        bresume.setBounds(260, 360, 80, 30);
        this.add(p1);
        this.add(bstart);
        this.add(bpause);
        this.add(bresume);
        ButtonClick bc=new ButtonClick();
        bstart.addActionListener(bc);
        bpause.addActionListener(bc);
        bresume.addActionListener(bc);
    }
    class ButtonClick implements ActionListener{
 
        @Override
        public void actionPerformed(ActionEvent e) {
            // TODO Auto-generated method stub
            if(e.getSource()==bstart){
                p1.run();
            }
            else if(e.getSource()==bpause){
                
            }
            else if(e.getSource()==bresume){
                
            }
        }
    }
    public static void main(String[] args){
        new SingleThreadCarton();
    }
}

运行结果:

点击“开始”按钮后,程序奔溃。

多线程的窗体布局

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import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
 
import javax.swing.JButton;
import javax.swing.JFrame;
 
public class MultiThreadCarton extends JFrame{
    CartonPerson p1;
    Thread t1;
    JButton bstart=new JButton("开始");
    JButton bpause=new JButton("稍等");
    JButton bresume=new JButton("继续");
    MultiThreadCarton(){
        init();
        this.setTitle("奔跑的线程侠");
        this.setSize(600, 500);
        this.setResizable(true);
        this.setLocationRelativeTo(null);
        this.setDefaultCloseOperation(EXIT_ON_CLOSE);
        this.setVisible(true);
    }
    void init(){
        this.setLayout(null);
        p1=new CartonPerson(0);
        p1.setBounds(260, 100, 80, 160);
        bstart.setBounds(260,280, 80, 30);
        bpause.setBounds(260, 320, 80, 30);
        bresume.setBounds(260, 360, 80, 30);
        this.add(p1);
        this.add(bstart);
        this.add(bpause);
        this.add(bresume);
        ButtonClick bc=new ButtonClick();
        bstart.addActionListener(bc);
        bpause.addActionListener(bc);
        bresume.addActionListener(bc);
        t1=new Thread(p1);
    }
    class ButtonClick implements ActionListener{
        @Override
        public void actionPerformed(ActionEvent e) {
            // TODO Auto-generated method stub
            if(e.getSource()==bstart){
//              p1.run();
                t1.start();
            }
            else if(e.getSource()==bpause){
                t1.suspend();
            }
            else if(e.getSource()==bresume){
                t1.resume();
            }
        }
    }
    public static void main(String[] args){
        new MultiThreadCarton();
    }
}

运行结果:如顶图所示。

以上就是本次小编给大家带来的关于java中Swing会奔跑的线程侠这个示例的讲述,感谢大家对服务器之家的支持。

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