JavaJFrame窗口简单的摇奖

import java.util.Random;

import javax.swing.JLabel;

public class LabelThread implements Runnable {
JLabel lbl;

public LabelThread(JLabel lbl) {
this.lbl = lbl;

}

public void run() {
Random rand = new Random();
try {
while (true) {

Thread.currentThread().sleep(1);
lbl.setText("" + rand.nextInt(10));
}

} catch (InterruptedException e) {
System.out.println("结束");
}
}

}