jdk8自定义Compare排序

jdk1.8:

Collections.sort(list, (o1, o2) -> {
   return o1.getAge() - o2.getAge();
});

jdk1.7及以前:


Collections.sort(list, new Comparator() {
   @Override
   public int compare(Object o1, Object o2) {
      return o1.getAge() - o2.getAge();
   }
});


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