java Calendar 加月疑问

Question

Calendar c = Calendar.getInstance();// 获取当前时间c.set(Calendar.MONTH, c.get(Calendar.MONTH+6));怎么变的加2个月呢？ 我明明是指定加 6个月的呀？
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c.set(Calendar.MONTH, c.get(Calendar.MONTH+1));
加一个月 
怎么变的加 9个月了呢？

Answer 1

加一个月应该是这个
c.set(Calendar.MONTH, c.get(Calendar.MONTH)+6);Calendar.MONTH = 2
Calendar.DAY_OF_WEEK_IN_MONTH = 8;
Calendar.WEEK_OF_YEAR = 3;c.get(Calendar.MONTH+6) 实际变成 c.get(Calendar.DAY_OF_WEEK_IN_MONTH)

Answer 2

Calendar c = Calendar.getInstance();// 获取当前时间
System.out.println(c.getTime());
c.set(Calendar.MONTH, c.get(Calendar.MONTH) + 6);
System.out.println(c.getTime());
输出：
Tue Feb 21 14:10:01 CST 2012
Tue Aug 21 14:10:01 CST 2012

Answer 3

Calendar c = Calendar.getInstance();
c.add(Calendar.MONTH,6);PS:你括号写错了

Answer 4

c.set(Calendar.MONTH, c.get(Calendar.MONTH)+6)

Answer 5

这样才对呀
Calendar c = Calendar.getInstance();
c.add(Calendar.MONTH,6);
或者：
c.set(Calendar.MONTH, c.get(Calendar.MONTH)+6)

Answer 6

 c.set(Calendar.MONTH, c.get(Calendar.MONTH+6));// 等价 c.set(Calendar.MONTH, c.get(8)); c.set(Calendar.MONTH, c.get(Calendar.MONTH)  +6));