Java Stream distinct()方法

来源:这里教程网 时间:2026-02-17 21:12:13 作者:

Java Stream distinct()方法

distinct() 返回一个由流中不同元素组成的流。 distinct()是 Stream 接口的方法。这个方法使用hashCode()和equals()方法来获取不同的元素。在有序流的情况下,独特元素的选择是稳定的。但是,在无序流的情况下,不同元素的选择不一定是稳定的,可能会发生变化。 distinct()执行 有状态的中间操作 ,即它在内部保持一些状态以完成操作。

语法:

Stream<T> distinct()

下面给出了一些例子,以更好地理解函数的实现。

其中,Stream是一个接口,该函数 返回一个由不同元素组成的流 元素组成。

例1 :

// Implementation of Stream.distinct()// to get the distinct elements in the Listimport java.util.*;  class GFG {      // Driver code    public static void main(String[] args)    {          // Creating a list of integers        List<Integer> list = Arrays.asList(1, 1, 2, 3, 3, 4, 5, 5);          System.out.println("The distinct elements are :");          // Displaying the distinct elements in the list        // using Stream.distinct() method        list.stream().distinct().forEach(System.out::println);    }}

输出:

The distinct elements are :12345

例2 :

// Implementation of Stream.distinct()// to get the distinct elements in the Listimport java.util.*;  class GFG {      // Driver code    public static void main(String[] args)    {          // Creating a list of strings        List<String> list = Arrays.asList("Geeks", "for", "Geeks",                                          "GeeksQuiz", "for", "GeeksforGeeks");          System.out.println("The distinct elements are :");          // Displaying the distinct elements in the list        // using Stream.distinct() method        list.stream().distinct().forEach(System.out::println);    }}

输出:

The distinct elements are :GeeksforGeeksQuizGeeksforGeeks

例3 :

// Implementation of Stream.distinct()// to get the count of distinct elements// in the Listimport java.util.*;  class GFG {      // Driver code    public static void main(String[] args)    {          // Creating a list of strings        List<String> list = Arrays.asList("Geeks", "for", "Geeks",                                          "GeeksQuiz", "for", "GeeksforGeeks");          // Storing the count of distinct elements        // in the list using Stream.distinct() method        long Count = list.stream().distinct().count();          // Displaying the count of distinct elements        System.out.println("The count of distinct elements is : " + Count);    }}

输出:

The count of distinct elements is : 4

相关推荐