简单的Java秒表计时器（线程）

秒表的个个位数的计算：
package Seconds;public class Watch_time extends Thread{int ms,ms_1,ms_2;int s,s_1;int m,m_1;        Watch w;        public void  set(Watch w) {        this.w=w;        }public void setNum() { ms=ms_1= s=s_1=m=m_1=0;}public void run() {while(true) {try {Thread.sleep(9);ms_1++;if(ms_1==10) {ms_1=0;ms++;}if(ms==10) {ms=0;s_1++;}if(s_1==10) {s_1=0;s++;}if(s==6) {s=0;m_1++;}if(m_1==10) {m_1=0;m++;}            w.textArea.setText(m+""+m_1+":"+s+""+s_1+"."+ms+""+ms_1);} catch (InterruptedException e) {// TODO Auto-generated catch blocke.printStackTrace();}}    }}

Frame类：
可视化界面
package Seconds;import javax.swing.JFrame;import javax.swing.JPanel;import javax.swing.border.EmptyBorder;import javax.swing.JTextArea;import javax.swing.GroupLayout;import javax.swing.GroupLayout.Alignment;import javax.swing.JButton;import java.awt.event.ActionListener;import java.awt.event.ActionEvent;import javax.swing.JScrollPane;import java.awt.SystemColor;import java.awt.Font;import javax.swing.UIManager;import javax.swing.LayoutStyle.ComponentPlacement;import org.eclipse.wb.swing.FocusTraversalOnArray;import java.awt.Component;import java.awt.Color;public class Watch extends JFrame {/** *  */private static final long serialVersionUID = 1L;private JPanel contentPane;    JTextArea textArea = new JTextArea();    int a=1;    int i=0;public Watch(Watch_time w) {setTitle("\u79D2\u8868\u8BA1\u65F6\u5668                                                 --\u00A9Dong");textArea.setText("00:00.00");setVisible(true);setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);setBounds(100, 100, 450, 300);contentPane = new JPanel();JScrollPane scrollPane = new JScrollPane();scrollPane.setEnabled(false);contentPane.setBorder(new EmptyBorder(5, 5, 5, 5));setContentPane(contentPane);JTextArea textArea_1 = new JTextArea();textArea_1.setFont(new Font("Monospaced", Font.BOLD | Font.ITALIC, 13));textArea_1.setEditable(false);textArea_1.setBackground(UIManager.getColor("Button.background"));JTextArea textArea_2 = new JTextArea();textArea_2.setFont(UIManager.getFont("Viewport.font"));textArea_2.setEditable(false);textArea_2.setText("   \u51C6\u5907\u8BA1\u65F6");textArea_2.setBackground(SystemColor.control);JButton btnNewButton=new CircleButton("开始",Color.GREEN);btnNewButton.setBackground(Color.CYAN);JButton btnNewButton_1=new CircleButton("\u8BB0\u5F55",Color.GREEN);JButton btnNewButton_2=new CircleButton("\u91CD\u7F6E",Color.GREEN);btnNewButton.addActionListener(new ActionListener() {@SuppressWarnings("deprecation")public void actionPerformed(ActionEvent e) {if(btnNewButton.getText().equals("开始")){ if(a==1) {w.start();textArea_2.setText("  正在计时");    btnNewButton_1.setEnabled(true);    btnNewButton_2.setEnabled(false);btnNewButton.setText("暂停");a=2;}else {textArea_2.setText("  正在计时");btnNewButton_1.setEnabled(true);btnNewButton_2.setEnabled(false);   w.resume();               btnNewButton.setText("暂停");}}else {textArea_2.setText("     暂  "+"  停");btnNewButton_1.setEnabled(false);btnNewButton_2.setEnabled(true); w.suspend();btnNewButton.setText("开始");}}});btnNewButton_1.setEnabled(false);btnNewButton_1.addActionListener(new ActionListener() {public void actionPerformed(ActionEvent e) {textArea_1.append("第"+(++i)+"次计数:"+textArea.getText()+'\n');}});btnNewButton_2.setEnabled(false);btnNewButton_2.addActionListener(new ActionListener() {@SuppressWarnings("deprecation")public void actionPerformed(ActionEvent e) {textArea_1.setText("");i=0;btnNewButton_2.setEnabled(false);textArea.setText("00:00.00");textArea_2.setText("  准备计时");w.suspend();     w.setNum();}});GroupLayout gl_contentPane = new GroupLayout(contentPane);gl_contentPane.setHorizontalGroup(gl_contentPane.createParallelGroup(Alignment.TRAILING).addComponent(scrollPane, GroupLayout.DEFAULT_SIZE, 425, Short.MAX_VALUE).addGroup(gl_contentPane.createSequentialGroup().addGap(48).addComponent(btnNewButton, GroupLayout.PREFERRED_SIZE, 77, GroupLayout.PREFERRED_SIZE).addGap(38).addGroup(gl_contentPane.createParallelGroup(Alignment.LEADING).addGroup(gl_contentPane.createSequentialGroup().addComponent(btnNewButton_2, GroupLayout.PREFERRED_SIZE, 72, GroupLayout.PREFERRED_SIZE).addGap(44).addComponent(btnNewButton_1, GroupLayout.PREFERRED_SIZE, 72, GroupLayout.PREFERRED_SIZE).addContainerGap()).addGroup(Alignment.TRAILING, gl_contentPane.createSequentialGroup().addComponent(textArea, GroupLayout.PREFERRED_SIZE, 128, GroupLayout.PREFERRED_SIZE).addContainerGap(134, Short.MAX_VALUE)).addGroup(Alignment.TRAILING, gl_contentPane.createSequentialGroup().addComponent(textArea_2, GroupLayout.DEFAULT_SIZE, 84, Short.MAX_VALUE).addGap(178)))));gl_contentPane.setVerticalGroup(gl_contentPane.createParallelGroup(Alignment.TRAILING).addGroup(gl_contentPane.createSequentialGroup().addComponent(scrollPane, GroupLayout.DEFAULT_SIZE, 64, Short.MAX_VALUE).addGap(33).addComponent(textArea, GroupLayout.PREFERRED_SIZE, GroupLayout.DEFAULT_SIZE, GroupLayout.PREFERRED_SIZE).addPreferredGap(ComponentPlacement.RELATED).addComponent(textArea_2, GroupLayout.PREFERRED_SIZE, GroupLayout.DEFAULT_SIZE, GroupLayout.PREFERRED_SIZE).addGap(15).addGroup(gl_contentPane.createParallelGroup(Alignment.BASELINE).addComponent(btnNewButton_2, GroupLayout.PREFERRED_SIZE, 68, GroupLayout.PREFERRED_SIZE).addComponent(btnNewButton, GroupLayout.PREFERRED_SIZE, 66, GroupLayout.PREFERRED_SIZE).addComponent(btnNewButton_1, GroupLayout.PREFERRED_SIZE, 66, GroupLayout.PREFERRED_SIZE)).addGap(44)));textArea.setEditable(false);textArea.setFont(new Font("Monospaced", Font.BOLD | Font.ITALIC, 16));textArea.setBackground(SystemColor.control);scrollPane.setViewportView(textArea_1);contentPane.setLayout(gl_contentPane);contentPane.setFocusTraversalPolicy(new FocusTraversalOnArray(new Component[]{scrollPane, btnNewButton, textArea_1, btnNewButton_1, textArea, btnNewButton_2, textArea_2}));}}