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java开始计时代码 java程序计时
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求java的计时器代码，应该比较简单的，来看看吧。
package test;
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("开始");
private final Button btnPouse = new Button("暂停");
private final Button btnReset = new Button("复位");
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("继续")) {
swThread.go();
btnPouse.setLabel("暂停");
} else if (btnPouse.getLabel().equals("暂停")) {
swThread.noGo();
btnPouse.setLabel("继续");
}
}
}
private class btnResetListener implements ActionListener {
public void actionPerformed(ActionEvent e) {
swThread.reset();
btnGo.setEnabled(true);
btnGo.setLabel("开始");
btnPouse.setLabel("暂停");
}
}
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("计时:"));
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("计时器");
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);
}
}
可以改变有注释的那个if语句里面的值来判断什么时候停止
相关问答
Q1: Java怎么给方法计时？
java开始计时代码你可以在开始和结束的时候，分别记录下当前的时间的这毫秒数。然后再减，以下是一段代码。
public class Test{
public static void main(String[] args) {
long startMili=System.currentTimeMillis();// 当前时间对应的毫秒数
System.out.println("开始 "+startMili);
// 执行一段代码,求一百万次随机值
for(int i=0;i1000000;i++){
Math.random();
}
long endMili=System.currentTimeMillis();
System.out.println("结束 s"+endMili);
System.out.println("总耗时为java开始计时代码："+(endMili-startMili)+"毫秒");
}
}
Q2: 求人用java编写一条计时器代码。
import java.awt.BorderLayout;
import java.awt.Container;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.WindowEvent;
import java.awt.event.WindowListener;
import java.io.*;
import java.util.*;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JTextField;
import javax.swing.plaf.OptionPaneUI;
public class Demo {
static boolean isRuning=false;
static boolean isFirst=true;
@SuppressWarnings("unchecked")
public static void main(String[] args) throws Exception {
JFrame form1 = new JFrame("Form1");
JTextField jTextField = new JTextField(10);
jTextField.setSize(10, 10);
jTextField.setText("0");
jTextField.setEditable(false);
JButton jButton = new JButton("开始");
jButton.setSize(10, 10);
Thread thread = new Thread(new Runnable() {
@Override
public void run() {
while (true) {
while(isRuning){
Integer counter = Integer.parseInt(jTextField.getText().trim());
counter++;
jTextField.setText(counter.toString());
try {
Thread.sleep(1000);
} catch (Exception e2) {
}
}
}
}
});
jButton.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
String text=jButton.getText().equals("开始")?"暂停":"开始";
jButton.setText(text);
isRuning=!isRuning;
if(isFirst){
thread.start();
isFirst=false;
}
}
});
JPanel panel = new JPanel();
panel.setSize(200, 200);
panel.add(jTextField, BorderLayout.NORTH);
panel.add(jButton, BorderLayout.CENTER);
form1.add(panel);
form1.setBounds(200, 100, 250, 150);
form1.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
form1.addWindowListener(new WindowListener() {
@Override
public void windowOpened(WindowEvent e) {
// TODO Auto-generated method stub
}
@Override
public void windowIconified(WindowEvent e) {
// TODO Auto-generated method stub
}
@Override
public void windowDeiconified(WindowEvent e) {
// TODO Auto-generated method stub
}
@Override
public void windowDeactivated(WindowEvent e) {
// TODO Auto-generated method stub
}
@Override
public void windowClosing(WindowEvent e) {
// 窗口关闭前取出文本框的数字保存到外部文件，代码在此处写
JOptionPane.showMessageDialog(null, "Are you sure closing?");
}
@Override
public void windowClosed(WindowEvent e) {
// TODO Auto-generated method stub
}
@Override
public void windowActivated(WindowEvent e) {
// TODO Auto-generated method stub
}
});
form1.setVisible(true);
}
}
Q3: java编程利用按钮实现时钟的停止和开始功能（原代码）
如下：
import java.awt.*;
import java.awt.event.*;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.Timer;
import java.awt.geom.*;
import java.util.*;
class Clock extends Canvas
implements ActionListener{
static JButton jb=new JButton("开始");
static JButton jb1=new JButton("暂停");
Date date;
Timer secondTime;
int hour,munite,second;
Line2D secondLine,muniteLine,hourLine;
int a,b,c;
double pointSX[]=new double[60],//用来表示秒针端点坐标的数组
pointSY[]=new double[60],
pointMX[]=new double[60], //用来表示分针端点坐标的数组
pointMY[]=new double[60],
pointHX[]=new double[60], //用来表示时针端点坐标的数组
pointHY[]=new double[60];
Clock()
{ secondTime=new Timer(1000,this);
pointSX[0]=0; //12点秒针位置
pointSY[0]=-100;
pointMX[0]=0; //12点分针位置
pointMY[0]=-90;
pointHX[0]=0; //12点时针位置
pointHY[0]=-70;
double angle=6*Math.PI/180; //刻度为6度
for(int i=0;i59;i++) //计算出各个数组中的坐标
{ pointSX[i+1]=pointSX[i]*Math.cos(angle)-Math.sin(angle)*pointSY[i];
pointSY[i+1]=pointSY[i]*Math.cos(angle)+pointSX[i]*Math.sin(angle);
pointMX[i+1]=pointMX[i]*Math.cos(angle)-Math.sin(angle)*pointMY[i];
pointMY[i+1]=pointMY[i]*Math.cos(angle)+pointMX[i]*Math.sin(angle);
pointHX[i+1]=pointHX[i]*Math.cos(angle)-Math.sin(angle)*pointHY[i];
pointHY[i+1]=pointHY[i]*Math.cos(angle)+pointHX[i]*Math.sin(angle);
}
for(int i=0;i60;i++)
{ pointSX[i]=pointSX[i]+120; //坐标平移
pointSY[i]=pointSY[i]+120;
pointMX[i]=pointMX[i]+120; //坐标平移
pointMY[i]=pointMY[i]+120;
pointHX[i]=pointHX[i]+120; //坐标平移
pointHY[i]=pointHY[i]+120;
}
secondLine=new Line2D.Double(0,0,0,0);
muniteLine=new Line2D.Double(0,0,0,0);
hourLine=new Line2D.Double(0,0,0,0);
secondTime.start(); //秒针开始计时
}
public void paint(Graphics g)
{ for(int i=0;i60;i++) //绘制表盘上的小刻度和大刻度
{ int m=(int)pointSX[i];
int n=(int)pointSY[i];
if(i%5==0)
{ g.setColor(Color.red);
g.fillOval(m-4,n-4,8,8);
}
else
{ g.setColor(Color.cyan);
g.fillOval(m-2,n-2,4,4);
}
}
g.fillOval(115,115,10,10); //钟表中心的实心圆
Graphics2D g_2d=(Graphics2D)g;
g_2d.setColor(Color.red);
g_2d.draw(secondLine);
BasicStroke bs=
new BasicStroke(3f,BasicStroke.CAP_ROUND,BasicStroke.JOIN_MITER);
g_2d.setStroke(bs);
g_2d.setColor(Color.blue);
g_2d.draw(muniteLine);
bs=new BasicStroke(6f,BasicStroke.CAP_BUTT,BasicStroke.JOIN_MITER);
g_2d.setStroke(bs);
g_2d.setColor(Color.green);
g_2d.draw(hourLine);
}
public void actionPerformed(ActionEvent e)
{ if(e.getSource()==secondTime){
date=new Date();
String s=date.toString();
hour=Integer.parseInt(s.substring(11,13));
munite=Integer.parseInt(s.substring(14,16));
second=Integer.parseInt(s.substring(17,19)); //获取时间中的秒
int h=hour%12;
a=second; //秒针端点的坐标
b=munite; //分针端点的坐标
c=h*5+munite/12; //时针端点的坐标
secondLine.setLine(120,120,(int)pointSX[a],(int)pointSY[a]);
muniteLine.setLine(120,120,(int)pointMX[b],(int)pointMY[b]);
hourLine.setLine(120,120,(int)pointHX[c],(int)pointHY[c]);
repaint();
} if(e.getSource()==jb){
secondTime.start();
}if(e.getSource()==jb1){
secondTime.stop();
}
}
public static void main(String args[]){
JFrame win=new JFrame("时钟");
JPanel jp=new JPanel();
jp.add(jb);
jp.add(jb1);
Clock clock=new Clock();
jb.addActionListener(clock);
jb1.addActionListener(clock);
win.add(clock,BorderLayout.CENTER);
win.add(jp,"South");
win.setVisible(true);
win.setSize(246,300);
win.setDefaultCloseOperation(3) ;
win.validate();
}
}
运行截图：
有问题就追问，满意请采纳。
Q4: 写一个计时器 JAVA代码是什么？
应该用线程里面java开始计时代码的Timer来控制package com.sy.game.test;
import java.util.Timer;
import java.util.TimerTask;
public class TimeTask {
public static void main(String[] args) {
TimeTask tTask=new TimeTask();
tTask.timeVoid();
}
public void timeVoid(){
final Timer timer = new Timer();
TimerTask tt=new TimerTask() {
@Override
public void run() {
System.out.println("到点啦!");
timer.cancel();
}
};
timer.schedule(tt, 3000);
}
}
整合java开始计时代码的java开始计时代码：
/*
* java倒计时器
* shiyang
* */
package com.sy.game.test;
import java.awt.Container;
import java.awt.FlowLayout;
import java.awt.Toolkit;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JTextField;
import javax.swing.Timer;
@SuppressWarnings("unused")
public class TimeController extends JFrame implements ActionListener {
private static final long serialVersionUID = 4603262282860990473L;
private static final int DEFAULT_WIDTH = 200;
private static final int DEFAULT_HEIGHT = 100;
private static final int width = Toolkit.getDefaultToolkit()
.getScreenSize().width;
private static final int height = Toolkit.getDefaultToolkit()
.getScreenSize().height;
private Container container;
private JButton btn;
private JTextField jtfTime;
private Timer tmr;
public TimeController() {
initComponents();
Timer tmr = new Timer(1000, this);
this.tmr = tmr;
setVisible(true);
}
private void initComponents() {
this.setTitle("SY秒表");
this.setSize(DEFAULT_WIDTH, DEFAULT_HEIGHT);
this.setResizable(false);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
this.setLocation((width - DEFAULT_WIDTH) / 2,
(height - DEFAULT_HEIGHT) / 2);
jtfTime = new JTextField("10");
btn = new JButton("开始倒计时");
container = getContentPane();
JPanel panel = new JPanel();
panel.add(btn);
panel.add(jtfTime);
this.add(panel);
btn.addActionListener(this);
}
public void actionPerformed(ActionEvent ae) {
if (ae.getSource() == btn) {
jtfTime.setText("10");
tmr.start();
} else {
int t;
t = Integer.parseInt(jtfTime.getText());
t--;
jtfTime.setText("" + t);
if (t = 0) {
tmr.stop();
}
}
}
public static void main(String[] args) {
TimeController timeController = new TimeController();
}
}
java开始计时代码的介绍就聊到这里吧，感谢你花时间阅读本站内容，更多关于java程序计时、java开始计时代码的信息别忘了在本站进行查找喔。
