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java考试倒计时代码 倒计时 java
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怎么编写一个倒计时的java的程序？求具体步骤！
基于控制台的话很简单的，我跟你说一下大体思路吧，二话不说先来个for循环，然后输出倒计时的数字，程序睡一秒，在输出倒计时数字，如此循环，简单吧，下面看程序：
public static void main(String[] args) {
for(int i=10;i0;i--){
System.out.print(i+" ");
try {
Thread.sleep(1000);
} catch (InterruptedException e) {
e.printStackTrace();
}
}
System.err.print("爆炸");
}
其他基于网页的还是基于用户界面都可以使用这个思路的
相关问答
Q1: 谁有用java的application编写的倒计时钟代码?
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;
}
}
}
}
Q2: java 倒计时的程序
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.KeyEvent;
import java.awt.event.KeyListener;
import java.util.Timer;
import java.util.TimerTask;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JTextField;
public class TimeThreadFrame extends JFrame{
// 定义组件
private JLabel lblTime;
private JTextField txtInput;
private JButton btnEnter;
// 构造方法
public TimeThreadFrame(){
// 设置窗体java考试倒计时代码的相关属性
super("TimerThread");
this.setSize(300,200);
this.setLayout(null);
this.setLocation(100,50);
// 创建组件
this.lblTime = new JLabel("请输入倒计时时间");
this.lblTime.setBounds(30,20,200,30);
this.txtInput = new JTextField();
this.txtInput.setBounds(30,70,100,30);
this.btnEnter = new JButton("确定");
this.btnEnter.setBounds(150,70,70,30);
// 给JTextField注册监听
this.txtInput.addKeyListener(new KeyListener(){
public void keyPressed(KeyEvent ke) {
}
public void keyReleased(KeyEvent ke) {
}
public void keyTyped(KeyEvent ke) {
txtInput_KeyTyped(ke);
}
});
// 给JButton注册监听
this.btnEnter.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent ae){
btnEnter_ActionPerformed(ae);
}
});
// 将各组件添加到窗体上
add(lblTime);
add(txtInput);
add(btnEnter);
// 显示窗体
this.setVisible(true);
}
// 输入时的事件处理，控制用户只能输入数字
public void txtInput_KeyTyped(KeyEvent ke){
if(ke.getKeyChar() '0' || ke.getKeyChar() '9'){
ke.setKeyChar('\0');
}
}
// 点击按钮时的事件处理，核心java考试倒计时代码！
public void btnEnter_ActionPerformed(ActionEvent ae){
// 获得用户输入的倒计时时间
String strTime = this.txtInput.getText();
if(strTime.equals("")){
// 检测用户是否输入
this.lblTime.setText("您尚未输入，请输入java考试倒计时代码！");
}
else{
Integer time = Integer.parseInt(strTime);
// 创建线程
TimeThread tt = new TimeThread(this.lblTime,time);
tt.start();
// 创建Timer
Timer timer = new Timer();
timer.schedule(new TimerTask(){
// 启动其java考试倒计时代码他程序
public void run() {
System.out.print("ok");
}
}, time * 1000);
}
}
// 启动窗体
public static void main(String[] args){
new TimeThreadFrame();
}
}
// 时间线程类
class TimeThread extends Thread{
private JLabel lblTime;
private int time;
// 构造方法传入，显示事件的JLabel和倒计时的时间。
public TimeThread(JLabel lblTime, int time){
this.lblTime = lblTime;
this.time = time;
}
// run方法
public void run(){
while(time 0){
// 显示所剩时间
this.lblTime.setText("所剩时间：" + time);
// 所剩时间减少
time--;
try {
this.sleep(1000);
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}
}
满意请采纳。
Q3: MyEclipse如何编写一个考试系统倒计时,进入考试页面就开始计时？
要在MyEclipse中为考试系统创建倒计时计时器，可以使用JavaScript将计时器添加到考试页面。以下是如何做到这一点的示例：
在MyEclipse中打开检查页面的HTML文件。
将＜script＞元素添加到HTML文件的＜head＞部分。
在＜script＞元素中，添加以下代码以定义将显示倒计时计时器的JavaScript函数：
此函数将使用倒计时的总持续时间（以秒为单位）和一个HTML元素来显示计时器。然后，它将每秒更新显示元素的文本内容，以显示剩余时间。
将＜div＞元素添加到您希望显示倒计时计时器的检查页面。给元素一个id属性（例如“timer”）。
在＜script＞元素中，添加以下代码以在页面加载时启动倒计时计时器：
该代码将在页面加载时启动计时器，使用5分钟（300秒）的持续时间和id为“timer”的＜div＞元素。您可以调整显示元素的持续时间和选择器，以满足您的特定需求。
将此代码添加到考试页面后，页面加载后，倒计时计时器应立即启动，并显示考试结束前的剩余时间。
Q4: 写一个计时器 JAVA代码是什么？
应该用线程里面java考试倒计时代码的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考试倒计时代码的java考试倒计时代码：
/*
* 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();
}
}
Q5: 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(); } } } }}
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