Calendar类-set()方法的延时操作

import java.util.Calendar;

public class LazyTest {

public static void main(String[] args) {
 Calendar cal = Calendar.getInstance();
 cal.set(2003, 7, 31);
 cal.set(Calendar.MONTH , 8);
 System.out.println(cal.getTime());
 cal.set(Calendar.DATE, 5);
 System.out.println(cal.getTime());
 
 }
}

Wed Oct 01 21:02:26 CST 2003
Sun Oct 05 21:02:26 CST 2003