一个用JAVA编写的洗澡提醒程序，对话框练习，程序员也可以逗女朋友玩

import java.util.*;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

import javax.swing.JOptionPane;

public class SecondSample {
public static void main(String[] args)
{

String setTime = null;
setTime=JOptionPane.showInputDialog(null, "你是打算  hh:mm 去洗澡阿？\n（例如:08:30）");
checkInput bb = new checkInput(setTime);
int hour=bb.returnHour();
int minute=bb.returnMinute();
//System.out.println(setTime);

while(true)
{
GregorianCalendar d= new GregorianCalendar();
if((d.get(Calendar.HOUR_OF_DAY)>=hour) && (d.get(Calendar.MINUTE)>=minute))
{
remaidWindow ppp=new remaidWindow(d.get(Calendar.HOUR_OF_DAY),d.get(Calendar.MINUTE));
JOptionPane.showMessageDialog(null,"已经  "+d.get(Calendar.HOUR_OF_DAY)+":"+d.get(Calendar.MINUTE)+" 了，快给我滚去洗澡", "Now is :", JOptionPane.PLAIN_MESSAGE);
ppp.remaidShow();
break;
}

}
//ppp.remaidShow();
System.exit(0);
}

}
class remaidWindow
{
public remaidWindow (int hour, int miniute)
{
d=hour+":"+miniute;
}
public void remaidShow()
{
JOptionPane.showMessageDialog(null,"还点个毛线，知道你就要点了不去，点不点都得去，都  "+d+" 了，快去！！！", "Again :", JOptionPane.PLAIN_MESSAGE);
JOptionPane.showMessageDialog(null,"咋地，还管不了你了，还点！", "Again :", JOptionPane.PLAIN_MESSAGE);
JOptionPane.showMessageDialog(null,"点毛线了点，小样，你还能把我点完了！", "Again :", JOptionPane.PLAIN_MESSAGE);
JOptionPane.showMessageDialog(null,"接着点啊，咋不点了，快洗澡去！！！", "Again :", JOptionPane.PLAIN_MESSAGE);
}
private String d;
}
class checkInput
{
public checkInput (String asetTime)
{
Pattern pattern = Pattern.compile("[\\d{2}]:[\\d{2}]");
Matcher matcher = pattern.matcher(asetTime);
boolean checkNum=matcher.find();
//System.out.println(checkNum);
if (checkNum){
String setTimeHour=asetTime.substring(0,2);
String setTimeMinute=asetTime.substring(3,5);
hour=Integer.parseInt(setTimeHour);
minute=Integer.parseInt(setTimeMinute);
//			System.out.println(hour);
//			System.out.println(minute);
}
else{
JOptionPane.showMessageDialog(null,"格式错了，要写成18:30这样的，重启动吧！", "格式警告！！！", JOptionPane.ERROR_MESSAGE);
System.exit(0);
}

if (hour>24||minute>59)
{
JOptionPane.showMessageDialog(null,"小逗比，这是你家自创的时间吧！"+"\n"+"重新启动吧", "警告:使用者智商太低！", JOptionPane.ERROR_MESSAGE);
System.exit(0);
}
}
public int returnHour()
{
return hour;
}
public int returnMinute()
{
return minute;
}
private int hour, minute;
}