In java, Swing will run in the thread Xia, javaswing thread Xia

In java, Swing will run in the thread Xia, javaswing thread Xia

Effect:

Crash thread Xia: (single thread)

When the main thread is processing the request to refresh the image, it cannot accept other requests and is in a blocked endless loop.

Draw Images

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();}}}@Overridepublic void paintComponent(Graphics g) {// TODO Auto-generated method stubsuper.paintComponent(g);g.drawImage(img[index], 0, 0, getWidth(), getHeight(), this);//System.out.println(index);if(index==5){index=0;}else{index++;}}}

Single-threaded form layout

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 ("START"); JButton bpause = new JButton ("wait "); JButton bresume = new JButton ("continue"); SingleThreadCarton () {init (); this. setTitle ("failed thread Xia"); this. setSize (600,500); this. setResizable (true); this. setLocationRelativeTo (null); this. setdefaclocloseoperation (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. set bounds (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 {@ Overridepublic void actionreceivmed (ActionEvent e) {// TODO Auto-generated method stubif (e. getSource () = bstart) {p1.run ();} else if (e. getSource () = bpause) {} else if (e. getSource () = bresume) {}} public static void main (String [] args) {new SingleThreadCarton ();}}

Running result:

Click the start button to crash the program.

Multi-threaded form layout

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 ("START"); JButton bpause = new JButton ("wait "); JButton bresume = new JButton ("continue"); MultiThreadCarton () {init (); this. setTitle ("Running thread Xia"); this. setSize (600,500); this. setResizable (true); this. setLocationRelativeTo (null); this. setdefaclocloseoperation (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. set bounds (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 {@ Overridepublic void actionreceivmed (ActionEvent e) {// TODO Auto-generated method stubif (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 ();}}

Running result: As shown in the top figure.

The above is an example of the thread Xia that will run in Swing in java. Thank you for your support.