「java计时工具」java实现计时器

本篇文章给大家谈谈java计时工具，以及java实现计时器对应的知识点，希望对各位有所帮助，不要忘了收藏本站喔。

本文目录一览：

• 1、JAVA计时器，怎么写
• 2、如何用java实现一个计时器？
• 3、用java编写一个倒计时器代码。
• 4、用JAVA编写计时器

JAVA计时器，怎么写

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("计时器");

JButton butnStart=new JButton("开始");

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("开始");

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);

}

}

}

满意请采纳。

如何用java实现一个计时器？

用java实现一个计时器的方法：

publicclassTestDingShiimplementsRunnable

{

Threadxc;

Daodao=newDaoImpl();

publicTestDingShi()

{

xc=newThread(this);//线程开启

xc.start();

}

publicvoidrun()

{

while(true)

{

try

{

xc.sleep(1000);//睡眠开始计时

}

catch(InterruptedExceptione)

{

//TODOAuto-generatedcatchblock

e.printStackTrace();

}

//TODO定时在此

}

}

}

用java编写一个倒计时器代码。

import java.awt.BorderLayout;import java.awt.Container;import java.awt.Font;import java.awt.GridLayout;import java.awt.event.ActionEvent;import java.awt.event.ActionListener;import javax.swing.JButton;import javax.swing.JFrame;import javax.swing.JOptionPane;import javax.swing.JPanel;import javax.swing.JTextField;public class TimerDemo extends JFrame implements ActionListener { private static final long serialVersionUID = 201306211111L; private JTextField screen = new JTextField("0"); private JButton start = new JButton("开始"); private JButton reset = new JButton("重置"); private JPanel panel = new JPanel(); private boolean isRunning; private int time; private int timeBetween; public TimerDemo(int timeBetween) { super("计时器"); this.timeBetween = timeBetween; try { init(); } catch (Exception e) { e.printStackTrace(); } } public TimerDemo() { super("计时器"); this.timeBetween = 100; try { init(); } catch (Exception e) { e.printStackTrace(); } } private void init() { panel.setLayout(new GridLayout()); panel.add(start); panel.add(reset); start.addActionListener(this); reset.addActionListener(this); screen.setFont(new Font("幼圆", Font.BOLD, 60)); screen.setHorizontalAlignment(JTextField.CENTER); screen.setEditable(false); Container c = getContentPane(); c.setLayout(new BorderLayout()); c.add(panel, BorderLayout.SOUTH); c.add(screen, BorderLayout.CENTER); this.setSize(200, 150); this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); this.setResizable(false); this.setLocationRelativeTo(null); this.setVisible(true); } public static void main(String[] args) { new TimerDemo(1);// 设定 1ms/次 // new TimerDemo(); } @Override public void actionPerformed(ActionEvent e) { if (e.getSource() == start) { if (start.getText().equals("开始")) { start.setText("暂停"); isRunning = true; } else if (start.getText().equals("暂停")) { start.setText("开始"); isRunning = false; } } if (e.getSource() == reset) { start.setText("开始"); screen.setText("0"); isRunning = false; time = 0; } new Thread(new TimeZone()).start(); } class TimeZone implements Runnable { @Override public void run() { while (isRunning) { time++; if (time = Integer.MAX_VALUE) { screen.setText("ERROR"); JOptionPane.showMessageDialog(null, "ERROR"); isRunning = false; } screen.setText(String.valueOf(time)); try { Thread.sleep(timeBetween); } catch (Exception e) { e.printStackTrace(); } } } }}

用JAVA编写计时器

计时器可以使用timer类也可以使用线程类来操作，下面是Thread做的简单的计时器

public class Calculagraph extends Thread {

public static void main(String[] args) {

new Calculagraph().start();

}

private long now = 0l;

private long start = System.currentTimeMillis();// 程序启动时间的毫秒值

private long time;

public void run() {

while (true) {

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

time = now - start;// 两个时间相减的到毫秒差

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

time / (1000 * 60 * 60) % 60/* 时 */, 

time / (1000 * 60)% 60/* 分 */, 

time / 1000 % 60/* 秒 */);// 格式化字符串输出

try {

Thread.sleep(1000);

} catch (InterruptedException e) {

e.printStackTrace();

}

}

}

}

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