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问题描述
要触发一些未来的事件,我试图创建一个将执行以下操作的算法:
- 生成一定量的随机日期格式为
yyyy-mm-dd
- 以格式
hh为每个日期生成时间: mm:ss
时间应该在9到22小时之间(24小时) - 将这些项目添加到String数组。 1个完整的数组条目看起来像
2013-02-25 09:45:23
$ b $我没有明确的想法如何执行这一点。任何建议?
解决方案
确切方案您需要什么..
public class RandomDateTime {
public static void main(String [] args){
SimpleDateFormat dfDateTime = new SimpleDateFormat(yyyy-MM -dd hh:mm:ss,Locale.getDefault());
int year = RandomDateTime.randBetween(1900,2013); //这里您可以设置需要的年份范围
int month = RandomDateTime.randBetween(0,11);
int hour = RandomDateTime.randBetween(9,22); //时间将显示在9到22之间
int min = RandomDateTime.randBetween(0,59);
int sec = RandomDateTime.randBetween(0,59);
GregorianCalendar gc = new GregorianCalendar(年,月,1);
int day = RandomDateTime.randBetween(1,gc.getActualMaximum(gc.DAY_OF_MONTH));
gc.set(年,月,日,小时,最小,秒);
System.out.println(dfDateTime.format(gc.getTime()));
}
public static int randBetween(int start,int end){
return start +(int)Math.round(Math.random ()*(end-start));
}
}
您可以在以下位置找到更多的SimpleDateTime用途: a href =http://docs.oracle.com/javase/6/docs/api/java/text/SimpleDateFormat.html =nofollow> http://docs.oracle.com/javase/6/ docs / api / java / text / SimpleDateFormat.html
to trigger some future events I'm trying to create an algorithm which would do the following:
- generate a certain amount of random dates in format "
yyyy-mm-dd
" - generate time for each date in format "
hh:mm:ss
" Time should be (24h) between 9 and 22 hours - Add those items to a String array. 1 complete array entry looks like "
2013-02-25 09:45:23
"
I have no clear ideas how to perform this. Any suggestions?
解决方案
Exact Solution what you need..
public class RandomDateTime {
public static void main(String[] args) {
SimpleDateFormat dfDateTime = new SimpleDateFormat("yyyy-MM-dd hh:mm:ss",Locale.getDefault());
int year = RandomDateTime.randBetween(1900, 2013);// Here you can set Range of years you need
int month = RandomDateTime.randBetween(0, 11);
int hour = RandomDateTime.randBetween(9, 22); //Hours will be displayed in between 9 to 22
int min = RandomDateTime.randBetween(0, 59);
int sec = RandomDateTime.randBetween(0, 59);
GregorianCalendar gc = new GregorianCalendar(year, month, 1);
int day = RandomDateTime.randBetween(1, gc.getActualMaximum(gc.DAY_OF_MONTH));
gc.set(year, month, day, hour, min,sec);
System.out.println(dfDateTime.format(gc.getTime()));
}
public static int randBetween(int start, int end) {
return start + (int)Math.round(Math.random() * (end - start));
}
}
You can find out more uses of SimpleDateTime at: http://docs.oracle.com/javase/6/docs/api/java/text/SimpleDateFormat.html
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