尝试过使用事件分发线程，但还是空白，线程确实是运行着的。
import java.awt.Color;
import java.awt.Graphics;
import javax.swing.JPanel;
import javax.swing.SwingUtilities;
public class test1 extends JPanel {
public void paint(Graphics g){
Thread t1=new Thread(new Runnable(){
public void run(){
g.fillRect(50, 50, 50, 50);
for(int i=0;;i++){
g.setColor(Color.BLACK);
g.fillRect(100+i*20,65,20,20);
try {
Thread.sleep(100);
} catch (InterruptedException e) {
e.printStackTrace();
}
g.setColor(Color.WHITE);
g.fillRect(100+i*20,65,20,20);
if((100+(i+1)*20)>=1500){
System.out.println("over1");
break;
}
}
}});
Thread t2=new Thread(){
public void run(){
g.fillRect(50, 500, 50, 50);
for(int i=0;;i++){
g.setColor(Color.BLACK);
g.fillRect(100+i*20,515,20,20);
try {
Thread.sleep(100);
} catch (InterruptedException e) {
e.printStackTrace();
}
g.setColor(Color.WHITE);
g.fillRect(100+i*20,515,20,20);
if((100+(i+1)*20)>=1500){
System.out.println("over2");
break;
}
}
}};
t1.start();
t2.start();
// SwingUtilities.invokeLater(t1);
// SwingUtilities.invokeLater(t2);
}
public test1() {
setBounds(50,50,1500,1000);
setVisible(true);
repaint();
}
public static void main(String[] args) {
new test1();
}
}
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