java时间运算

java时间运算

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1. } ?

---------------------------------Calendar c1 = Calendar.getInstance();?
c1.set(2005, 1, 1);?

Date dateCreatedStop = new java.sql.Date(new java.util.Date().getTime());?

Calendar c2 = Calendar.getInstance();?
c2.setTime(dateCreatedStop);?

long l1 = c1.getTimeInMillis();?
long l2 = c2.getTimeInMillis();?
// 计算天数?
long days = (l2 - l1) / (24 * 60 * 60 * 1000);?
System.out.println(days);?---------------------------------// import java.util.Calendar
// import java.util.Date
Calendar calendar = Calendar.getInstance();
calendar.setTime( new Date() ); //设置当前时间
calendar.add( Calendar.HOUR, 1 ); //加快一小时
Date hourLater = calendar.getTime();