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public static void main(String[] args) {
安庆网站制作公司哪家好，找成都创新互联！从网页设计、网站建设、微信开发、APP开发、响应式网站开发等网站项目制作，到程序开发，运营维护。成都创新互联从2013年创立到现在10年的时间，我们拥有了丰富的建站经验和运维经验，来保证我们的工作的顺利进行。专注于网站建设就选成都创新互联。
for (int i = 100 ; i = 0 ; i --) {
System.out.println(i);
try {
Thread.sleep(1000);
} catch (InterruptedException e) {
e.printStackTrace();
}
}
System.out.println("结束");
}
给你一个javascript 5秒 倒计时的例子。
title无标题文档/title
script type="text/javascript"
var totalTime=parseInt(6);
function countDown(){
if(totalTime==0){
return;
}else{
totalTime=totalTime-1;
window.document.form1.timeText.value=totalTime;
setTimeout("countDown()",1000);
}
}
/script
/head
body
form name="form1"
input type="text" name="timeText" /
input type="button" value="start" onclick="countDown();"
/form
/body
/html
如果用java实现web 倒计时，那么就一种后果，不断的刷新页面。除非用ajax 或者 javascript 还有一个就是 applet。 有啥问题可以hi我交流
import java.awt.BorderLayout;
import java.awt.Font;
import java.awt.Graphics;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JTextField;
import javax.swing.SwingConstants;
public class NanoTimeframe extends JPanel
{
private static final long serialVersionUID = -6135068834705503622L;
private JLabel lblTime;
private long start = 0L; // 从0毫秒开始
private static long MAXTIME = 5000L; // 5秒后结束
private boolean begin = false;
private JTextField setTime;
public NanoTimeframe()
{
this.lblTime = new JLabel("单击开始");
this.setTime = new JTextField();
System.out.println("1");
this.lblTime.setFont(new Font("Monospaced", Font.BOLD, 60));
this.lblTime.setHorizontalAlignment(SwingConstants.CENTER);
this.lblTime.addMouseListener(new MouseAdapter() {
public void mouseClicked(MouseEvent e)
{
MAXTIME = Long.parseLong(setTime.getText());
begin = true;
lblTime.setText(timeStr(start));
}
});
setLayout(new BorderLayout());
add(lblTime, BorderLayout.CENTER);
add(setTime, BorderLayout.NORTH);
}
private String timeStr(long time)
{
StringBuffer timeBuffer = new StringBuffer();
long miu = time / (60 * 1000);
time -= miu * 60 * 1000;
long se = time / 1000;
time -= se * 1000;
long mi = time % 1000;
timeBuffer.append(miu 10 ? ("0" + miu) : miu);
timeBuffer.append(".");
timeBuffer.append(se 10 ? ("0" + se) : se);
timeBuffer.append(".");
timeBuffer.append(mi 10 ? ("00" + mi) : (mi 100 ? ("0" + mi) : mi));
return timeBuffer.toString();
}
@Override
public void paintComponent(Graphics page)
{
if (!begin) return;
super.paintComponent(page);
if (start = MAXTIME)
{
lblTime.setText("Bomb!!!");
return;
}
start += 1;
lblTime.setText(timeStr(start));
}
public static void main(String [] args){
JFrame jf = new JFrame();
jf.setResizable(false);
jf.setBounds(0, 0, 460, 330);
jf.setLocationRelativeTo(null);
jf.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
jf.add(new NanoTimeframe());
jf.setVisible(true);
}
}
请给分 改得辛苦上面输入毫秒后计时
先不要关闭问题，给我点时间我编出来，我也想断炼一下。
代码如下：
我这程序有点问题 ，这倒计时你讲的功能都有了，但那个暂停按钮有问题，只能用两次，我怎么也找不出原因， 我想是多线程方面的问题吧，按两下那暂停按钮就失去作用了。
--------------------------MainFrame.java------------------------------------
import java.awt.Button;
import java.awt.FlowLayout;
import java.awt.Frame;
import java.awt.Label;
import java.awt.TextField;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
public class MainFrame extends Frame{
Dispose dp= null;
int flag=1; //暂停开始的按钮,1为计时中，0为暂停。
Button button=null;
Label l1 =null;
Label l2 =null;
Label l3 = null;
TextField tfh =null;
TextField tfm =null;
TextField tfs =null;
public void lanchFrame(){
this.setLocation(200,200);
this.setSize(200,200);
this.setLayout(new FlowLayout());
l1=new Label("hour");
tfh = new TextField("1",6);
l2=new Label("minute");
tfm = new TextField("3",6);
l3=new Label("second");
tfs = new TextField("5",6);
button = new Button("stop");
this.add(l1);
this.add(tfh);
this.add(l2);
this.add(tfm);
this.add(l3);
this.add(tfs);
this.add(button);
button.addActionListener(new StartAndStopListener(this));
this.addWindowListener(new MyClosingListener());
this.dp = new Dispose(this);
this.pack();
this.setVisible(true);
}
public static void main(String args[]){
MainFrame mf=new MainFrame();
mf.lanchFrame();
mf.dp.run(mf);
}
private class MyClosingListener extends WindowAdapter{
public void windowClosing(WindowEvent e){
System.exit(0);
}
}
}
--------------------------Dispose.java------------------------------------
public class Dispose {
int hour;
int minute;
int second;
public Dispose(MainFrame mf) {
this.hour = Integer.parseInt(mf.tfh.getText());
this.minute = Integer.parseInt(mf.tfm.getText());
this.second = Integer.parseInt(mf.tfs.getText());
}
public void run(MainFrame mf) {
while (!(hour == 0 minute == 0 second == 0) mf.flag == 1) {
if (second == 0) {
if (minute 0) {
second = 59;
minute--;
}
}
if (minute == 0) {
if (hour 0) {
minute = 59;
hour--;
}
}
second--;
mf.tfs.setText(second + "");
mf.tfm.setText(minute + "");
mf.tfh.setText(hour + "");
try {
Thread.sleep(1000);
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}
}
------------------------------StarAndStopListener.java-----------------------------
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
public class StartAndStopListener implements ActionListener {
MainFrame mf = null;
public StartAndStopListener(MainFrame mf){
this.mf = mf;
}
public void actionPerformed(ActionEvent arg0) {
if(mf.flag==0){
mf.flag =1;
mf.button.setLabel("stop");
mf.dp.run(mf);
}
if(mf.flag == 1){
mf.flag = 0;
mf.button.setLabel("start");
}
}
}
package hello;
import java.awt.*;
import java.applet.*;
import java.awt.event.*;
import java.util.*;
import java.awt.geom.*;
public class T extends Applet implements Runnable{
Thread tHour = null,tMinute = null,tSecond = null;//表示时针，分针和秒针的线程
int hour_a,hour_b,minute_a,minute_b,second_a,second_b;//表示时针，分针，秒针端点的整型变量
int hour = 0,minute = 0,second = 0;//获取当前时间的整型变量
//绘制时针，分针和秒针的Graphics对象
Graphics g_second = null,g_minute = null,g_hour =null;
//存放表盘刻度的数组，供指针走动时使用
double point_x[] = new double[61],point_y[] = new double[61];
//存放表盘刻度的数组，供绘制表盘使用
double scaled_x[] = new double[61],scaled_y[] = new double[61];
//判断小程序是否重新开始的变量
int start_count = 0;
public void init(){
g_hour = this.getGraphics();
g_hour.setColor(Color.CYAN);
g_second = this.getGraphics();
g_second.setColor(Color.RED);
g_minute = this.getGraphics();
g_minute.setColor(Color.blue);
g_second.translate(200,200);//进行坐标系统变换，将新坐标系原点设在（200，200）处
g_minute.translate(200,200);
g_hour.translate(200,200);
point_x[0] = 0; point_y[0] = -120;//各个时针12点处的位置坐标（按新坐标系的坐标）
scaled_x[0] = 0;scaled_y[0] = -140;//12点处的刻度位置坐标（按新坐标系的坐标）
double jiaodu = 6*Math.PI/180;
//表盘分割成60分，将分割点的坐标存放在数组中
for(int i = 0; i 60; i++){
point_x[i+1] = point_x[i]*Math.cos(jiaodu)-Math.sin(jiaodu)*point_y[i];
point_y[i+1] = point_y[i]*Math.cos(jiaodu) + point_x[i]*Math.sin(jiaodu);
}
point_x[60] = 0; point_y[60] = -120;
for(int i = 0; i 60; i++){
scaled_x[i+1] = scaled_x[i]*Math.cos(jiaodu)-Math.sin(jiaodu)*scaled_y[i];
scaled_y[i+1] = scaled_y[i]*Math.cos(jiaodu) + Math.sin(jiaodu)*scaled_x[i];
}
scaled_x[60]= 0;
scaled_y[60] = -140;
}
public void start(){
//每当小程序重新开始时，首先消灭线程，然后重新开始创建线程
if(start_count = 1){
tSecond.interrupt();
tMinute.interrupt();
tHour.interrupt();
}
tSecond = new Thread(this);
tMinute = new Thread(this);
tHour = new Thread(this);
tSecond.start();
tMinute.start();
tHour.start();
start_count++;
if(start_count = 2) start_count = 1;
}
public void stop()
{
tSecond.interrupt();
tMinute.interrupt();
tHour.interrupt();
}
public void paint(Graphics g){
this.start();
g.drawOval(50,50,300,300);//表盘的外圈
g.translate(200,200);
//绘制表盘的小刻度和大刻度
for(int i = 0 ; i 60; i++){
if(i%5 == 0){
g.setColor(Color.BLACK);
g.fillOval((int) scaled_x[i],(int) scaled_y[i],10,10);
}
else
g.fillOval((int)scaled_x[i],(int)scaled_y[i],5,5);
}
}
public void run(){
//获取本地时间
Date date = new Date();
String s=date.toString();
hour=Integer.parseInt(s.substring(11,13));
minute = Integer.parseInt(s.substring(14,16));
second = Integer.parseInt(s.substring(17,19));
if(Thread.currentThread() == tSecond){
second_a =(int)point_x[second];
second_b = (int)point_x[second];
g_second.drawLine(0,0,second_a,second_b);//秒针的初始位置
g_second.drawString("秒",second_a,second_b);
int i = second;
while(true){
try{
tSecond.sleep(1000);
Color c = getBackground();
g_second.setColor(c);
g_second.drawLine(0,0,second_a,second_b);//用背景色清除前一秒时的秒针
g_second.drawString("秒",second_a,second_b);
//如果秒针与分针重合，恢复分针的显示
if((second_a == minute_a)(second_b == minute_b)){
g_minute.drawLine(0,0,minute_a,minute_b);
g_minute.drawString("分",minute_a,minute_b);
}
//如果秒针与时针重合，恢复时针的显示
if((second_a == hour_a)(second_b == hour_b)){
g_hour.drawLine(0,0,hour_a,hour_b);
g_hour.drawString("时",hour_a,hour_b);
}
}
catch(InterruptedException e){
Color c = getBackground();
g_second.setColor(c);
g_second.drawLine(0,0,second_a,second_b);//用背景色清除秒针
g_second.drawString("秒",second_a,second_b);
return;
}
//秒针向前走一个单位
second_a=(int)point_x[(i+1)%60];
second_b = (int)point_y[(i+1)%60]; //每一秒走6度（一个单位格）
g_second.setColor(Color.red);
g_second.drawLine(0,0,second_a,second_b);
g_second.drawString("秒",second_a,second_b);
i++;
}
}
if(Thread.currentThread() == tMinute){
minute_a = (int)point_x[minute];
minute_b = (int)point_y[minute];
g_minute.drawLine(0,0,minute_a,minute_b);
int i = minute;
while(true){
//第一次过60-second秒就前进一分钟，以后每过60秒前进一分钟
try{
tMinute.sleep(1000*60 - second*1000);
second = 0;
Color c = getBackground();
g_minute.setColor(c);
g_minute.drawLine(0,0,minute_a,minute_b);
g_minute.drawString("分",minute_a,minute_b);
if((hour_a == minute_a)(hour_b== minute_b)){
g_hour.drawLine(0,0,minute_a,minute_b);
g_hour.drawString("时",hour_a,hour_b);
}
}
catch(InterruptedException e){
return;
}
minute_a = (int)point_x[(i+1)%60];
minute_b = (int)point_y[(i+1)%60];
g_minute.setColor(Color.BLUE);
g_minute.drawLine(0,0,minute_a,minute_b);
g_minute.drawString("分",minute_a,minute_b);
i++; second = 0;
}
}
if(Thread.currentThread() == tHour){
int h = hour%12;
hour_a = (int)point_x[h*5 + minute/12];
hour_b = (int)point_y[h*5 + minute/12];
int i = h*5 + minute/12;
g_hour.drawLine(0,0,hour_a,hour_b);
g_hour.drawString("时",hour_a,hour_b);
while(true){
//第一次过12-minute%12分钟就前进一个刻度，以后每过12分钟前进一个刻度
try{
tHour.sleep(1000*60*12 - 1000*60*(minute%12) - second *1000);
minute = 0;
Color c = getBackground();
g_hour.setColor(c);
g_hour.drawLine(0,0,hour_a,hour_b);
g_hour.drawString("时",hour_a,hour_b);
}
catch(InterruptedException e){
return;
}
hour_a = (int)point_x[(i+1)%60];
hour_b = (int)point_y[(i+1)%60];
g_hour.setColor(Color.CYAN);
g_hour.drawLine(0,0,hour_a,hour_b);
g_hour.drawString("时",hour_a,hour_b);
i++;minute = 0;
}
}
}
}