苍白的笑〃

回答时间：2019-12-05

向TA提问

package com.nokia;

import java.awt.BorderLayout;

import java.awt.GridLayout;

import java.awt.event.ActionEvent;

import java.awt.event.ActionListener;

import java.util.Arrays;

//import java.awt.event.ActionListener;

import java.util.Calendar;

import java.util.Date;

import java.util.Timer;

import java.util.TimerTask;

import javax.swing.JButton;

import javax.swing.JFrame;

import javax.swing.JLabel;

import javax.swing.JOptionPane;

import javax.swing.JPanel;

import javax.swing.JTextField;

//Graduate time from java school: 2010-8-19

public class CountDown extends JFrame{

private long longTime;

private long currentTime;

private long distTime;

private long day, hour, minutes, seconds;

private JTextField t_eventname;

private JTextField t_eventtime;

private JButton ok;

private JPanel mainframe;

private GridLayout grid;

private BorderLayout border;

private JLabel jl;

private ActionListener actionlistener;

private String eventname;

private Calendar cal;

public CountDown(){

this("CountDown Timer");

}

public CountDown(String frameName) {

super(frameName);

initial();

setSize(400, 200);

//this.setResizable(false);

this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

setLocationByPlatform(true);

this.setVisible(true);

this.requestFocus();

//CDown();

}

private void initial() {

createComponent();

layOut();

listener();

}

private void createComponent() {

cal = Calendar.getInstance();

t_eventname = new JTextField();

t_eventtime = new JTextField();

mainframe = new JPanel();

border = new BorderLayout();

grid = new GridLayout(4, 1);

ok = new JButton("OK");

jl = new JLabel();

}

private void layOut() {

this.getContentPane().add(mainframe);

mainframe.setLayout(grid);

mainframe.add(t_eventname);

mainframe.add(t_eventtime);

mainframe.add(ok);

mainframe.add(jl);

}

private void listener() {

actionlistener = new ActionListener() {

@Override

public void actionPerformed(ActionEvent e) {

eventname = t_eventname.getText();

String eventtime = t_eventtime.getText();

if (eventname.equals("")){

JOptionPane.showMessageDialog(mainframe, "please input the Event name");

return;

}

if (eventtime.equals("")){

JOptionPane.showMessageDialog(mainframe, "please input the Event Time");

return;

}

if (!eventtime.matches("\\d{4}/\\d{2}/\\d{2}/\\d{2}:\\d{2}:\\d{2}")){

JOptionPane.showMessageDialog(mainframe, "please input the right format Time like 1989/04/09/09:22:34");

/*here you should judge if the time is the right time, such as not 1989/23/34 ...

* after that, you should be sure here the time is in the future! good luck

* */

return;

}

String [] temp = eventtime.split("/|:");

//System.out.println(Arrays.toString(temp));

cal.set(Integer.valueOf(temp[0]), Integer.valueOf(temp[1]),

Integer.valueOf(temp[2]), Integer.valueOf(temp[3]),

Integer.valueOf(temp[4]), Integer.valueOf(temp[5]));

CDown();

}

};

ok.addActionListener(actionlistener);

}

public void CDown() {

Timer timer = new Timer();

//JFrame jf = new JFrame();

//jf.add(jl);

//jf.setVisible(true);

//jf.setSize(400, 150);

//jf.getDefaultCloseOperation();

timer.schedule(new TimerTask() {

@Override

public void run() {

// 返回历元到指定时间的毫秒数。

longTime = cal.getTimeInMillis();

// 返回自 1970 年 1 月 1 日 00:00:00 GMT 以来此 Date 对象表示的毫秒数。

currentTime = new Date().getTime();

distTime = longTime - currentTime;

day = ((distTime / 1000) / (3600 * 24));

hour = ((distTime / 1000) - day * 86400) / 3600;

minutes = ((distTime / 1000) - day * 86400 - hour * 3600) / 60;

seconds = (distTime / 1000) - day * 86400 - hour * 3600

- minutes * 60;

jl.setText(eventname + day + " 天 " + hour + "小时 :" + minutes

+ "分钟 :" + seconds + "秒");

}

}, 0, 1000);

}

public static void main(String[] args) {

new CountDown("CountDown Timeer");

}

}

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