从Date类添加年份 [英] Adding Years from Date class

问题描述

假设我有这个：

 PrintStream out = System.out;
 Scanner in = new Scanner(System.in);
 out.print("Enter a number ... ");
 int n = in.nextInt();

我有一个随机日期，例如05/06/2015（不是固定日期，它随机每次）。如果我想参加这个日期的年份，并在今年添加n，我该怎么做？

i have a random date, for example, 05/06/2015 (its not a fixed date, its random everytime). If I want to take the 'year' of the this date, and add whatever 'n' is to this year, how do i do that?

所有方法日期类不是'int'。

all the methods in Date Class aren't 'int'.

并且要从int添加年份，'years'也必须是int

and to add years from an int, 'years' has to be an int as well

推荐答案

您需要将日期转换为日历。

Calendar c = Calendar.getInstance();
c.setTime(randomDate);
c.add(Calendar.YEAR, n);
newDate = c.getTime();

您可以将年份（或其他字段）作为日历进行操作，然后将其转换回日期。

You can manipulate the Year (or other fields) as a Calendar, then convert it back to a Date.

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