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我在 Java 中有一个字符串集的 ArrayList
List<Set< String >> combinations;
根据 Set 的大小以升序排列 ArrayList 的最佳方法是什么?
编写一个Comparator<Set<String>>比较size()两个 Set 实例的结果。使用将 Comparator 作为第二个参数的 Collections.sort 方法。
Comparator<Set<String>>
size()