java8 比较器

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我是靠谱客的博主哭泣大炮，这篇文章主要介绍java8 比较器，现在分享给大家，希望可以做个参考。

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Collections.sort(annotationList,

(o1,o2)->{
return new Integer(((ExcelField)o1[0]).sort()).compareTo(
new Integer(((ExcelField)o2[0]).sort())
);
});

在JDK8 的编译环境下，形如上的代码会提示

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 /**
Reports Comparators defined as lambda expressions which could be expressed using methods like Comparator.comparing().
Some comparators like (person1, person2) -> person1.getName().compareTo(person2.getName()) could be simplified
like this: Comparator.comparing(Person::getName).
Also suggests to replace chain comparisons with Comparator.thenComparing(),
e.g.
int res = o1.first.compareTo(o2.first);
if(res == 0)
res = o1.second.compareTo(o2.second);
if(res == 0)
res = o1.third - o2.third;
return res;
will be replaced with
objs.sort(Comparator.comparing((Obj o) -> o.first).thenComparing(o -> o.second).thenComparingInt(o -> o.third));
*/