对比两个数组，删除其中一个数据的交集数据

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测试代码：

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public static void main(String\[\] args) {
  String\[\] s1 = {"1","2","3","4"};
  String\[\] s2 = {"3","4","5","6"};

  TreeSet ts1 = new TreeSet(Arrays.asList(s1));

  ts1.removeAll(Arrays.asList(s2));

  System.out.println(ts1);
}

输出：

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[1, 2]