실시간으로 시간 보기

package com.test0614;

import java.awt.BorderLayout;

import java.awt.Frame;

import java.awt.TextArea;

import java.awt.event.WindowAdapter;

import java.awt.event.WindowEvent;

import java.util.Calendar;

public class Test7 extends Frame implements Runnable {

private TextArea ta=new TextArea();

public Test7(){

addWindowListener(new WindowAdapter() {

@Override

public void windowClosing(WindowEvent e) {

System.exit(0);

}

});

add(ta, BorderLayout.CENTER);

setSize(400,400);

setVisible(true);

}

public static void main(String[] args) {

Thread t=new Thread(new Test7());

t.start();

}

@Override

public void run() {

while(true){

Calendar cal=Calendar.getInstance();

String s=String.format("%tF %tT", cal, cal);

setTitle(s);

try{

Thread.sleep(10);

}catch(Exception e){

}

}

}

}

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결과)

제목 표시줄에 실시간으로 표시된다.