在java中获得两组之间对称差异的最佳方法是什么?

I'm wondering if there is a quick/clean way to get the symmetric difference between two sets ?

我有:

Set<String> s1 = new HashSet<String>();
s1.add("a");
s1.add("b");
s1.add("c");

Set<String> s2 = new HashSet<String>();
s2.add("b");

我需要类似的东西:

Set<String> diff = Something.diff(s1, s2);
// diff would contain ["a", "c"]

<小时>

只是为了澄清我需要对称差异.

推荐答案

你可以使用 Google Guava 库(真的很棒，我强烈推荐它！):

Sets.difference(s1, s2);
Sets.symmetricDifference(s1, s2);