「java倒计时项目设计」用java编写一个倒计时

博主：adminadmin 2023-03-18 02:58:06 487

今天给各位分享java倒计时项目设计的知识，其中也会对用java编写一个倒计时进行解释，如果能碰巧解决你现在面临的问题，别忘了关注本站，现在开始吧！

本文目录一览：

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(); } } } }}

java怎么在swing文本框中实现一个时间倒计时的界面？项目需要，谢谢

通常可以设置某个固定的切换时间，之后显示固定的或者是随机的显示某张图片，举例：importjava.awt.*;importjava.awt.event.*;importjavax.swing.*;publicclassMousDemoextendsJFrame{MyJPanelmp;intindex;ImageIcon[]imgs={newImageIcon("C:\\Users\\lenovo\\Desktop\\a.png"),newImageIcon("C:\\Users\\lenovo\\Desktop\\b.png")};publicMousDemo(){mp=newMyJPanel(false);this.add(mp);this.setSize(300,200);this.setDefaultCloseOperation(EXIT_ON_CLOSE);this.setTitle("鼠标窗口");this.setVisible(true);/***方式一，使用TImer来切换图片*Swing下的Timer组件，个人觉得非常适合*Timer(200,newActionListener());意思就是每200毫秒执行一次ActionListener里面的方法**/Timertimer=newTimer(200,newActionListener(){@OverridepublicvoidactionPerformed(ActionEvente){mp.flag=!mp.flag;mp.repaint();}});timer.start();}publicstaticvoidmain(String[]args){newMousDemo();}classMyJPanelextendsJPanel{booleanflag;publicMyJPanel(booleanflag){this.flag=flag;}@Overridepublicvoidpaint(Graphicsg){super.paint(g);if(flag==false){g.drawImage(imgs[0].getImage(),0,0,this);}else{g.drawImage(imgs[1].getImage(),0,0,this);}}}}

java 设计一个简单的倒计时

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！

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！");

}

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();

}

}

}

}

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

怎样用JAVA写一个10钟倒计时程序?

import java.awt.Color;

import java.util.*;

import java.awt.*;

import java.applet.*;

public class Clock extends Applet implements Runnable

{

Thread timer=null;

Label label;

int lastxs=50,lastys=30,lastxm=50,lastym=30,lastxh=50,lastyh=30;

public void init()

{

label=new Label(" ");

setBackground(Color.white);

add(label);

}

public void paint(Graphics g)

{

int xh,yh,xm,ym,xs,ys,s,m,h,xcenter,ycenter;

Date rightnow=new Date();

String today=rightnow.toLocaleString();

label.setText(today);

s=rightnow.getSeconds();

m=rightnow.getMinutes();

h=rightnow.getHours();

xcenter=100;

ycenter=80;

xs=(int)(Math.cos(s*3.14f/30-3.14f/2)*45+xcenter);

ys=(int)(Math.sin(s*3.14f/30-3.14f/2)*45+ycenter);

xm=(int)(Math.cos(m*3.14f/30-3.14f/2)*45+xcenter);

ym=(int)(Math.sin(m*3.14f/30-3.14f/2)*45+ycenter);

xh=(int)(Math.cos((h*30+m*2)*3.14f/180-3.14f/2)*30+xcenter);

yh=(int)(Math.sin((h*30+m*2)*3.14f/180-3.14f/2)*30+ycenter);

g.setFont(new Font("TimesToman",Font.PLAIN,14));

g.setColor(Color.orange);

g.fill3DRect(xcenter-50,ycenter-50,100,100,true);

g.setColor(Color.darkGray);

g.drawString("12",xcenter-5,ycenter-37);

g.drawString("3",xcenter+40,ycenter+3);

g.drawString("6",xcenter-3,ycenter+45);

g.drawString("9",xcenter-45,ycenter+3);

g.setColor(Color.orange);

if(xs!=lastxs||ys!=lastys)

{

g.drawLine(xcenter,ycenter,lastxs,lastys);

}

if(xm!=lastxm||ym!=lastym)

{

g.drawLine(xcenter,ycenter-1,lastxm,lastym);

g.drawLine(xcenter-1,ycenter,lastxm,lastym);

}

if(xh!=lastxh||yh!=lastyh)

{

g.drawLine(xcenter,ycenter-1,lastxh,lastyh);

g.drawLine(xcenter-1,ycenter,lastxh,lastyh);

}

g.setColor(Color.red);

g.drawLine(xcenter,ycenter,xs,ys);

g.drawLine(xcenter,ycenter-1,xm,ym);

g.drawLine(xcenter-1,ycenter,xm,ym);

g.drawLine(xcenter,ycenter-1,xh,yh);

g.drawLine(xcenter-1,ycenter,xh,yh);

lastxs=xs;

lastys=ys;

lastxm=xm;

lastym=ym;

lastxh=xh;

lastyh=yh;

}

public void start()

{

if(timer==null)

{

timer=new Thread(this);

timer.start();

}

}

public void stop()

{

timer=null;

}

public void run()

{

while(timer!=null)

{

try

{

Thread.sleep(1000);

}catch(InterruptedException ie){}

repaint();

}

timer=null;

}

public void update(Graphics g)

{

paint(g);

}

}

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