「java线程移动」java线程yield
本篇文章给大家谈谈java线程移动，以及java线程yield对应的知识点，希望对各位有所帮助，不要忘了收藏本站喔。
本文目录一览：
编写JAVA线程两个正方形分别从左上角移动
lz 你好
我做了一个比较简单的雏形
绿色正方形水平随机运动
蓝色正方形垂直随机运动
import java.awt.*;
import javax.swing.*;
import java.awt.event.*;
import java.math.*;
public class MoveRect extends Frame implements Runnable{
private Rectangle hRect, vRect;
private Image buffer;
private Object o = new Object();
public MoveRect(){
super("MoveRect");
hRect = new Rectangle(50,0,50,50);//水平随机运动的正方形
vRect = new Rectangle(0,50,50,50);//垂直随机运动的正方形
setUndecorated(true);
setLocation(500,200);
setSize(400,400);
setVisible(true);
addWindowListener(new WindowAdapter(){
public void windowClosing(WindowEvent e){
System.exit(0);
}
});
}
//启动循环绘制(使正方形一直循环的运动)
public void circleDraw(){
}
//绘制正方形的状态
public void drawRect(Graphics g,Rectangle r){
g.drawRect(r.x, r.y, r.width, r.height);
}
//双缓冲机制(主要解决闪屏)
public void update(Graphics g){
buffer = createImage(getSize().width, getSize().height);
if(buffer != null){
Graphics g2 = buffer.getGraphics();
paint(g2);
g2.dispose();
g.drawImage(buffer, 0, 0, this);
}
else{
paint(g);
}
}
public void paint(Graphics g){
g.setColor(Color.GREEN);
drawRect(g,hRect);
g.setColor(Color.BLUE);
drawRect(g,vRect);
hRect.x = (int)(Math.random()*351);
vRect.y = (int)(Math.random()*351);
}
public void run(){
while(true){
stop();
rePaint();
}
}
//同步方法rePaint
public synchronized void rePaint(){
repaint();
}
//同步方法stop
public synchronized void stop(){
if(hRect.x = 50 vRect.y = 50){
try {
Thread.sleep(500);
}
catch (Exception ex) {
ex.printStackTrace();
}
}
}
public static void main(String[] args){
new Thread(new MoveRect()).start();
}
}
希望能帮助你哈
Java多线程移动的小球
同一个Thread不能start两次
这样改下
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Graphics;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
@SuppressWarnings("serial")
public class MoveBall02 extends JFrame {
private JButton jbtu = null;
private Ball02 ball = null;
Thread t = null;
public static void main(String[] args) {
new Test();
}
public Test() {
this.setTitle("移动的小球");
this.setSize(600, 500);
this.setLocation(100, 100);
this.setDefaultCloseOperation(EXIT_ON_CLOSE);
ball = new Ball02(40, 40);
this.add(ball);
t = new Thread(ball);
jbtu = new JButton("点击移动小球");
this.add(jbtu, BorderLayout.SOUTH);
jbtu.addActionListener(new MyActionListener());
this.setVisible(true);
}
class MyActionListener implements ActionListener {
public void actionPerformed(ActionEvent e) {
if (e.getSource() == jbtu) {
// 响应鼠标点击事件
if (!t.isAlive()) {
t = new Thread(ball);
t.start();
}
}
}
}
}
@SuppressWarnings("serial")
class Ball02 extends JPanel implements Runnable {
private int x, y;
public Ball02(int x, int y) {
this.x = x;
this.y = y;
}
@Override
public void paint(Graphics g) {
super.paint(g);
g.setColor(Color.RED);
g.fillOval(x, y, 40, 40);
}
public void run() {
try {
for (int i = 0; i 20; i++) {
x = y += 3;
this.repaint();
Thread.sleep(100);
}
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}
java多线程实现玩家移动功能？
加if判断，分线路。重复的线路比如a-b可以只写一个方法。用到就调用。
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