用代码关闭窗口解决方案

用代码关闭窗口
我想让窗口显示借秒后关闭，下面是我写的程序：

Java code

package lianxi;import javax.swing.JDialog;import java.awt.event.WindowEvent;public class TestJDialog extends JDialog {        public TestJDialog()    {                }        public static void main(String args[])    {        timeListener lis;        TestJDialog tj= new TestJDialog();        tj.setVisible(true);        lis= new timeListener(tj);        Thread thread= new Thread(lis);        thread.start();        }}class timeListener implements Runnable{    private TestJDialog testJDialog;    public timeListener(TestJDialog testJDialog)    {        this.testJDialog=testJDialog;    }        public void run() {        for(long i=0;i<10000;i++)//延时        {            System.out.println("i==="+i);        }        //问题：在此处添加代码，将testJDialog关闭，如何实现            }}