分享程序员开发的那些事...
更新时间：2022-04-12 15:59:32
1.线程的休眠例子：实现在窗体中自动画线段的功能
实现界面：
详细代码：
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package com.lixiyu;
import java.awt.Color;
import java.awt.Graphics;
import java.util.Random;
import javax.swing.JFrame;
import javax.swing.WindowConstants;
public class SleepMethodTest extends JFrame{
/** *
*/
private static final long serialVersionUID = -8195789572929250861L;
private Thread t;
private static Color[]color={
Color.BLACK,Color.BLUE,Color.CYAN,Color.GREEN,Color.ORANGE,Color.YELLOW,Color.RED,Color.PINK,Color.LIGHT_GRAY
};private static final Random rand=new Random();
private static Color getC(){
return color[rand.nextInt(color.length)];
}public SleepMethodTest(){
t=new Thread(new Runnable(){
int x=30;
int y=50;
public void run(){
while(true){
try{
Thread.sleep(100);
}catch(InterruptedException e){
e.printStackTrace();
}
Graphics graphics=getGraphics();//创建Graphics对象
graphics.setColor(getC());//设置颜色
graphics.drawLine(x, y, 150, y++);//实现在窗体中画横线,100指画出来的线的长度
if(y>=80){
y=50;
}
}
}
});
t.start();
}public static void main(String[] args){
init(new SleepMethodTest(),200,200);
}public static void init(JFrame frame,int width,int height){
frame.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
frame.setSize(width,height);
frame.setVisible(true);
}} |
2.线程的挂起例子：通过join方法实现对进度条的控制
实现界面：
详细代码：
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package com.lixiyu;
import java.awt.BorderLayout;
import javax.swing.JFrame;
import javax.swing.JProgressBar;
public class JoinTest extends JFrame{
/** *
*/
private static final long serialVersionUID = 5631108658842378793L;
private Thread threadA;
private Thread threadB;
final JProgressBar progressBar=new JProgressBar();
final JProgressBar progressBar2=new JProgressBar();
int count=0;
public static void main(String[] args){
init(new JoinTest(),200,150);
}public JoinTest(){
super();
getContentPane().add(progressBar,BorderLayout.NORTH);
getContentPane().add(progressBar2,BorderLayout.SOUTH);
progressBar.setStringPainted(true);
progressBar2.setStringPainted(true);
threadA=new Thread(new Runnable(){//使用匿名内部类形式初始化Thread实例
int count=0;
@SuppressWarnings("static-access")
public void run(){//重写run(）方法
while(true){
progressBar.setValue(++count);//设置进度条的当前值
try{
threadA.sleep(100);
threadB.join();//使线程B调用join方法
}catch(Exception e){
e.printStackTrace();
}
}
}
});
threadA.start();
threadB=new Thread(new Runnable(){
int count=0;
@SuppressWarnings("static-access")
public void run(){
while(true){
progressBar2.setValue(++count);
try{
threadB.sleep(100);
}catch(Exception e){
e.printStackTrace();
}
if(count==100)
break;
}
}
});
threadB.start();
}
public static void init(JFrame frame,int width,int height){
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setSize(width,height);
frame.setVisible(true);
}} |
3.线程的中断例子：interrupte()设置线程正确的停止方式
实现界面：
详细代码：
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package com.lixiyu;
import java.awt.BorderLayout;
import javax.swing.JFrame;
import javax.swing.JProgressBar;
public class InterruptedSwing extends JFrame{
/** *
*/
private static final long serialVersionUID = 2575518138753855667L;
Thread thread;final JProgressBar progressBar=new JProgressBar();
public static void main(String[] args){
init(new InterruptedSwing(),200,150);
}public InterruptedSwing(){
super();
getContentPane().add(progressBar,BorderLayout.NORTH);
progressBar.setStringPainted(true);
thread=new Thread(new Runnable(){
int count=0;
@SuppressWarnings("static-access")
public void run(){
progressBar.setValue(++count);
try{
thread.sleep(2000);
}catch(InterruptedException e){
System.out.println("当前线程中断");
}
}
});
thread.start();
thread.interrupt();
}public static void init(JFrame frame,int width,int height){
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setSize(width, height);
frame.setVisible(true);
}}
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