자바로 시계 제작중 어려움이 있어 도움 요청합니다. ㅠㅠ

자바로 시계 만들어 프레임띄워서 타이틀바에 시계를 쓰레드 적용시켜 올리고 싶은데..
잘 안되네요. 고수님들 도와주세요..

import java.awt.*;
import javax.swing.*;
import java.util.*;
import java.text.*;
class Timer_Frame extends JFrame {
private Dimension Screen;
private Dimension Frame_Screen;
private int xpos;
private int ypos;
private Container ctn;
private String time;
private TimeThread thread = new TimeThread();
private SimpleDateFormat dataformat = new SimpleDateFormat(hh:mm:ss);

public Timer_Frame() {
init();
event_start();
thread.start();
this.setSize( 300, 200 );
Screen = Toolkit.getDefaultToolkit().getScreenSize();
Frame_Screen = this.getSize();
xpos = (int)(Screen.getWidth()/2 - Frame_Screen.getWidth()/2);
ypos = (int)(Screen.getHeight()/2 - Frame_Screen.getHeight()/2);
this.setLocation( xpos, ypos );
this.setVisible( true );
//System.out.println(time);
}

class TimeThread extends Thread {

public void run() {
try {
while( true ) {
Thread.sleep(1000);
time = dataformat.format(new Date());
String tim = String.valueOf(time);
System.out.println(tim);
//getTimer( tim );
//System.out.println(time);
}
}catch( InterruptedException ee ) {
ee.printStackTrace();
}
}
}

public void getTimer( String times ) {
this.time = times;
}

public void init() {
ctn = this.getContentPane();
}

public void event_start() {
this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}
}

class Timer_Main {
public static void main( String args[] ) {
Timer_Frame f = new Timer_Frame();
}
}