Java 8删除重复的字符串,无论列表中的大小写如何

Question

我们如何从String列表中删除重复元素而不考虑每个单词的大小写,例如考虑下面的代码片段

    String str = "Kobe Is is The the best player In in Basketball basketball game .";
    List<String> list = Arrays.asList(str.split("\\s"));
    list.stream().distinct().forEach(s -> System.out.print(s+" "));

这仍然提供与下面相同的输出,这是显而易见的

Kobe Is is The the best player In in Basketball basketball game .

我需要如下结果

Kobe Is The best player In Basketball game .

Answer 1

从字面上看你的问题,"无论列表中的情况如何都删除重复的字符串",你可以使用

// just for constructing a sample list
String str = "Kobe Is is The the best player In in Basketball basketball game .";
List<String> list = new ArrayList<>(Arrays.asList(str.split("\\s")));

// the actual operation
TreeSet<String> seen = new TreeSet<>(String.CASE_INSENSITIVE_ORDER);
list.removeIf(s -> !seen.add(s));

// just for debugging
System.out.println(String.join(" ", list));