java - 如何从列表<String>中删除重复元素？

Question

列表列表 = ["f1,f2","f2,f3","f4,f5","f2,f1","f5,f4"];

输出列表将是 列表 uniqueList = ["f1,f2","f2,f3","f4,f5"]

Answer 1

我有另一个解决方案。如果您不想准备另一个类来比较 List 内的值。您可以用逗号分隔每个值并对这些数据进行排序。之后，您可以再次将它们转换为字符串集

public static void main(String[] args) {
    List<String> stringList = Arrays.asList("f1,f2", "f2,f3", "f4,f5", "f2,f1", "f5,f4");
    Set<String> result = new HashSet<>();
    for (String s : stringList) {
        String[] elements = s.split(",");
        Arrays.sort(elements);
        result.add(Arrays.toString(elements));
    }

    for (String e : result){
        System.out.println(e);
    }
}