java（线程）实现一个秒表功能

import java.awt.Container;
import java.awt.Font;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.text.NumberFormat;

import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;

public class Miaobiao extends JFrame{
JButton start,pause,stop;
JLabel hour,min,sec;
Start ss;
public static void main(String[] args) {
new Miaobiao();
}
public Miaobiao(){

/**********Jframe制作一个秒表界面**********/
this.setTitle("秒表");
this.setSize(500, 300);
this.setLocationRelativeTo(null);
Container c=this.getContentPane();
c.setLayout(null);
this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

/**********时钟**********/
hour=new JLabel("00");
hour.setBounds(80, 70, 80, 50);
hour.setFont(new Font("Consolas", Font.BOLD, 50));
hour.setHorizontalAlignment(JLabel.CENTER);

/**********时钟分钟件冒号**********/
JLabel m_1=new JLabel(":");
m_1.setBounds(170, 70, 30, 50);
m_1.setFont(new Font("Consolas", Font.BOLD, 50));

/**********分钟**********/
min=new JLabel("00");
min.setBounds(200, 70, 80, 50);
min.setFont(new Font("Consolas", Font.BOLD, 50));
min.setHorizontalAlignment(JLabel.CENTER);

/**********分钟和秒钟间的冒号**********/
JLabel m_2=new JLabel(":");
m_2.setBounds(290, 70, 30, 50);
m_2.s
4000
etFont(new Font("Consolas", Font.BOLD, 50));

/**********秒钟**********/
sec=new JLabel("00");
sec.setBounds(320, 70, 80, 50);
sec.setFont(new Font("Consolas", Font.BOLD, 50));
sec.setHorizontalAlignment(JLabel.CENTER);

/**********开始按钮**********/
start=new JButton("开始");
start.setBounds(30, 200, 100, 30);
start.addActionListener(new ActionListener() {

@Override
public void actionPerformed(ActionEvent e) {
start.setEnabled(false);
stop.setEnabled(true);
pause.setEnabled(true);
ss=new Start(hour,min,sec);
ss.start();
}
});

/**********暂停按钮**********/
pause=new JButton("暂停");
pause.setBounds(190, 200, 100, 30);
pause.setEnabled(false);
pause.addActionListener(new ActionListener() {

@Override
public void actionPerformed(ActionEvent e) {
start.setEnabled(true);
stop.setEnabled(true);
pause.setEnabled(false);
new Pause(ss).start();
}
});

/**********结束按钮**********/
stop=new JButton("结束");
stop.setBounds(350, 200, 100, 30);
stop.setEnabled(false);
stop.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
start.setEnabled(true);
stop.setEnabled(false);
pause.setEnabled(false);
new Pause(ss).start();
sec.setText("00");
min.setText("00");
hour.setText("00");

}
});

c.add(start);
c.add(pause);
c.add(stop);
c.add(hour);
c.add(m_1);
c.add(min);
c.add(m_2);
c.add(sec);
this.setVisible(true);

}
}
class Start extends Thread{
JLabel s,m,h;

public Start(JLabel h,JLabel m,JLabel s){
this.h=h;
this.m=m;
this.s=s;
}
@Override
public void run() {
int time_s,time_m,time_h;
time_s=Integer.parseInt(s.getText());
time_m=Integer.parseInt(m.getText());
time_h=Integer.parseInt(h.getText());

NumberFormat nf = NumberFormat.getInstance();   //调整时间的输出格式
nf.setMinimumIntegerDigits(2) ;     //让时分秒都显示为两位数
while (true) {
try {
Thread.sleep(1000);
} catch (InterruptedException e) {
break;  //如果中断此线程，跳出死循环从而结束线程
}
time_s++;
if (time_s>=60) {
time_m++;
time_s=0;   //秒钟等于60，分钟加1，秒钟置0
if(time_m>=60){
time_h++;
time_m=0;
if(time_m>=24){
time_h=0;
}
}
}

s.setText(nf.format(time_s));   //  格式化输出 e.g. 0:0:1——>00:00:01
m.setText(nf.format(time_m));
h.setText(nf.format(time_h));

}
}

}
class Pause extends Thread{
Start ss;
public Pause(Start ss) {
this.ss=ss;
}
@Override
public void run() {
ss.interrupt();
}

}