求java的計時器代碼，應(yīng)該比較簡單的，來看看吧。

package?test;

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import?java.util.*;

import?java.awt.*;

import?java.awt.event.*;

import?java.applet.*;

public?class?Test5?extends?Applet?{

private?final?Panel?pan?=?new?Panel();

private?final?Label?time?=?new?Label();

private?final?Button?btnGo?=?new?Button("開始");

private?final?Button?btnPouse?=?new?Button("暫停");

private?final?Button?btnReset?=?new?Button("復(fù)位");

private?final?StopwatchThread?swThread?=?new?StopwatchThread();

private?class?btnGoListener?implements?ActionListener?{

public?void?actionPerformed(ActionEvent?e)?{

???

swThread.go();

btnGo.setEnabled(false);

}

}

private?class?btnPouseListener?implements?ActionListener?{

public?void?actionPerformed(ActionEvent?e)?{

???if(btnGo.isEnabled()){

???return?;

???}

?if?(btnPouse.getLabel().equals("繼續(xù)"))?{

swThread.go();

btnPouse.setLabel("暫停");

}?else?if?(btnPouse.getLabel().equals("暫停"))?{

swThread.noGo();

btnPouse.setLabel("繼續(xù)");

}

}

}

private?class?btnResetListener?implements?ActionListener?{

public?void?actionPerformed(ActionEvent?e)?{

swThread.reset();

btnGo.setEnabled(true);

btnGo.setLabel("開始");

btnPouse.setLabel("暫停");

}

}

private?class?StopwatchThread?extends?Thread?{

private?boolean?going?=?false;

private?long?prevElapsed?=?0;

private?Date?startDate?=?new?Date();

private?long?elapsedTime()?{

return?prevElapsed?+

(going???new?Date().getTime()?-?startDate.getTime()?:?0);

}

private?String?msToString(long?time)?{

???System.out.println(time+"??"+((0*60+2)*1000+999));

if(((99*60+59)*1000+983)=time((99*60+59)*1000+999)=time){//((0*60+2)*1000+983)=time((0*60+2)*1000+999)=time

if?(time?%?1000??990)

time?+=?2;

swThread.noGo();

}

String?ms,?sec,?min;

if?(time?%?10?=?5)

time?+=?5;

ms?=?Long.toString(time?%?1000);

while?(ms.length()??3)

ms?=?"0"?+?ms;

ms?=?ms.substring(0,?ms.length()?-?1);

time?/=?1000;

sec?=?Long.toString(time?%?60);

if?(sec.length()?==?1)?sec?=?"0"?+?sec;

time?/=?60;

min?=?Long.toString(time);

return?min?+?":"?+?sec?+?"."?+?ms;

}

public?void?go()?{

startDate?=?new?Date();

going?=?true;

}

public?void?noGo()?{

prevElapsed?=?elapsedTime();

going?=?false;

}

public?void?reset()?{

going?=?false;

prevElapsed?=?0;

}

public?void?run()?{

while?(true)?{

time.setText(msToString(elapsedTime()));

yield();

}

}

}

public?void?init()?{

setLayout(new?GridLayout(2,2));

setBackground(Color.lightGray);

setForeground(Color.black);

pan.setLayout(new?GridLayout(3,2));

pan.add(new?Label("計時:"));

time.setForeground(Color.blue);

pan.add(time);

pan.add(btnGo);

pan.add(btnPouse);

pan.add(btnReset);

pan.add(new?Label());

add(pan);

btnGo.addActionListener(new?btnGoListener());

btnReset.addActionListener(new?btnResetListener());

btnPouse.addActionListener(new?btnPouseListener());

swThread.setDaemon(true);

swThread.start();

}

public?static?void?main(String[]?args)?{

Test5?applet?=?new?Test5();

Frame?aFrame?=?new?Frame("計時器");

aFrame.addWindowListener(new?WindowAdapter()?{

public?void?windowClosing(WindowEvent?e)?{

System.exit(0);

}

});

aFrame.add(applet,?BorderLayout.CENTER);

aFrame.setSize(400,?200);

applet.init();

applet.start();

aFrame.setVisible(true);

}

}

可以改變有注釋的那個if語句里面的值來判斷什么時候停止

Java怎么給方法計時？

你可以在開始和結(jié)束的時候，分別記錄下當(dāng)前的時間的這毫秒數(shù)。然后再減，以下是一段代碼。

public class Test{

public static void main(String[] args) {

long startMili=System.currentTimeMillis();// 當(dāng)前時間對應(yīng)的毫秒數(shù)

System.out.println("開始 "+startMili);

// 執(zhí)行一段代碼,求一百萬次隨機值

for(int i=0;i1000000;i++){

Math.random();

}

long endMili=System.currentTimeMillis();

System.out.println("結(jié)束 s"+endMili);

System.out.println("總耗時為："+(endMili-startMili)+"毫秒");

}

}

Java 秒表

package demo;

import javax.swing.*;

import java.awt.HeadlessException;

import java.awt.BorderLayout;

import java.awt.FlowLayout;

import java.awt.Font;

import java.awt.event.ActionListener;

import java.awt.event.ActionEvent;

public class Timer extends JFrame {

private static final long serialVersionUID = 1L;

private static final String INITIAL_LABEL_TEXT = "00:00:00 000";

// 計數(shù)線程

private CountingThread thread = new CountingThread();

// 記錄程序開始時間

private long programStart = System.currentTimeMillis();

// 程序一開始就是暫停的

private long pauseStart = programStart;

// 程序暫停的總時間

private long pauseCount = 0;

private JLabel label = new JLabel(INITIAL_LABEL_TEXT);

private JButton startPauseButton = new JButton("開始");

private JButton resetButton = new JButton("清零");

private ActionListener startPauseButtonListener = new ActionListener() {

public void actionPerformed(ActionEvent e) {

if (thread.stopped) {

pauseCount += (System.currentTimeMillis() - pauseStart);

thread.stopped = false;

startPauseButton.setText("暫停");

} else {

pauseStart = System.currentTimeMillis();

thread.stopped = true;

startPauseButton.setText("繼續(xù)");

}

}

};

private ActionListener resetButtonListener = new ActionListener() {

public void actionPerformed(ActionEvent e) {

pauseStart = programStart;

pauseCount = 0;

thread.stopped = true;

label.setText(INITIAL_LABEL_TEXT);

startPauseButton.setText("開始");

}

};

public Timer(String title) throws HeadlessException {

super(title);

setDefaultCloseOperation(EXIT_ON_CLOSE);

setLocation(300, 300);

setResizable(false);

setupBorder();

setupLabel();

setupButtonsPanel();

startPauseButton.addActionListener(startPauseButtonListener);

resetButton.addActionListener(resetButtonListener);

thread.start(); // 計數(shù)線程一直就運行著

}

// 為窗體面板添加邊框

private void setupBorder() {

JPanel contentPane = new JPanel(new BorderLayout());

contentPane.setBorder(BorderFactory.createEmptyBorder(5, 5, 5, 5));

this.setContentPane(contentPane);

}

// 配置按鈕

private void setupButtonsPanel() {

JPanel panel = new JPanel(new FlowLayout());

panel.add(startPauseButton);

panel.add(resetButton);

add(panel, BorderLayout.SOUTH);

}

// 配置標簽

private void setupLabel() {

label.setHorizontalAlignment(SwingConstants.CENTER);

label.setFont(new Font(label.getFont().getName(), label.getFont().getStyle(), 40));

this.add(label, BorderLayout.CENTER);

}

// 程序入口

public static void main(String[] args) {

try {

UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());

} catch (Exception e) {

e.printStackTrace();

}

Timer frame = new Timer("計時器");

frame.pack();

frame.setVisible(true);

}

private class CountingThread extends Thread {

public boolean stopped = true;

private CountingThread() {

setDaemon(true);

}

@Override

public void run() {

while (true) {

if (!stopped) {

long elapsed = System.currentTimeMillis() - programStart - pauseCount;

label.setText(format(elapsed));

}

try {

sleep(1); // 1毫秒更新一次顯示

} catch (InterruptedException e) {

e.printStackTrace();

System.exit(1);

}

}

}

// 將毫秒數(shù)格式化

private String format(long elapsed) {

int hour, minute, second, milli;

milli = (int) (elapsed % 1000);

elapsed = elapsed / 1000;

second = (int) (elapsed % 60);

elapsed = elapsed / 60;

minute = (int) (elapsed % 60);

elapsed = elapsed / 60;

hour = (int) (elapsed % 60);

return String.format("%02d:%02d:%02d %03d", hour, minute, second, milli);

}

}

}

你可以試試，希望能幫到你！

JAVA計時器，怎么寫

import java.awt.BorderLayout;

import java.awt.Font;

import java.awt.event.ActionEvent;

import java.awt.event.ActionListener;

import javax.swing.JButton;

import javax.swing.JFrame;

import javax.swing.JLabel;

import javax.swing.JPanel;

public class TimeCount extends JFrame implements ActionListener{

ThreadCount tc=new ThreadCount(this);

Thread thread=new Thread(tc);

JPanel panelN=new JPanel(),panelC=new JPanel();

JLabel label=new JLabel("計時器");

JButton butnStart=new JButton("開始");

boolean toEnd;

public TimeCount() {

setBounds(100,100,300,300);

setVisible(true);

label.setFont(new Font(null,Font.BOLD,22));

panelN.add(label);

add(panelN,BorderLayout.NORTH);

panelC.add(butnStart);

add(panelC,BorderLayout.CENTER);

butnStart.addActionListener(this);

validate();

setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

}

public void actionPerformed(ActionEvent arg0) {

if(arg0.getSource()==butnStart){

if(!thread.isAlive()){

thread=new Thread(tc);

thread.start();

}else {

toEnd=true;

}

}

}

public static void main(String[] args) {

new TimeCount();

}

}

class ThreadCount implements Runnable{

TimeCount lc;

public ThreadCount(TimeCount lc) {

super();

this.lc = lc;

}

public void run() {

int i=1;

while(true){

if(lc.toEnd){

lc.toEnd=false;

lc.butnStart.setText("開始");

return;

}

try {

Thread.sleep(2);

} catch (InterruptedException e) {

// TODO: handle exception

}

i+=2;

int min=i/60000;

int second=(i%60000)/1000;

int mm=i%1000;

String show="";

if(min0)

show+=min+":";

if(second0)

show+=second+".";

show+=mm;

lc.label.setText(show);

}

}

}

滿意請采納。

java定時器

import?java.io.IOException;

import?java.util.Timer;

public?class?TimerTest?{

public?static?void?main(String[]?args)?{

Timer?timer?=?new?Timer();

timer.schedule(new?MyTask(),?1000,?2000);//?在1秒后執(zhí)行此任務(wù),每次間隔2秒,如果傳遞一個Data參數(shù),就可以在某個固定的時間執(zhí)行這個任務(wù).

while?(true)?{//?這個是用來停止此任務(wù)的,否則就一直循環(huán)執(zhí)行此任務(wù)了

try?{

int?ch?=?System.in.read();

if?(ch?-?'c'?==?0)?{

timer.cancel();//?使用這個方法退出任務(wù)

}

}?catch?(IOException?e)?{

//?TODO?Auto-generated?catch?block

e.printStackTrace();

}

}

}

static?class?MyTask?extends?java.util.TimerTask?{

@Override

public?void?run()?{

//?TODO?Auto-generated?method?stub

System.out.println("________");

}

}

}

這段代碼基本能滿足你需求了 你還有需求就在上面再套一層job 當(dāng)然如過太復(fù)雜了而且這種定時需求很多的話 建議用quartz框架 使用很簡單

用JAVA編寫計時器

計時器可以使用timer類也可以使用線程類來操作，下面是Thread做的簡單的計時器

public?class?Calculagraph?extends?Thread?{

public?static?void?main(String[]?args)?{

new?Calculagraph().start();

}

private?long?now?=?0l;

private?long?start?=?System.currentTimeMillis();//?程序啟動時間的毫秒值

private?long?time;

public?void?run()?{

while?(true)?{

now?=?System.currentTimeMillis();//?獲取一秒之后的毫秒值

time?=?now?-?start;//?兩個時間相減的到毫秒差

System.out.format("%02d:%02d:%02d\n",

time?/?(1000?*?60?*?60)?%?60/*?時?*/,?

time?/?(1000?*?60)%?60/*?分?*/,?

time?/?1000?%?60/*?秒?*/);//?格式化字符串輸出

try?{

Thread.sleep(1000);

}?catch?(InterruptedException?e)?{

e.printStackTrace();

}

}

}

}

當(dāng)前題目：java時間計時器代碼,java時鐘代碼
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