Stream.distinct() 在 Java 中


stream 类的 distinct() 方法返回包含此流的不同元素的流。语法如下 -

Stream<T> distinct()

示例

以下是实现 Stream 类中 distinct() 方法的示例 -

import java.util.*;
public class Demo {
   public static void main(String[] args) {
      List<Integer> list = Arrays.asList(10, 30, 40, 40, 50, 70, 90, 90, 100);
      System.out.println("List = "+list);
      System.out.println("Displaying only the distinct elements = ");
      list.stream().distinct().forEach(System.out::println);
   }
}

输出

List = [10, 30, 40, 40, 50, 70, 90, 90, 100]
Displaying only the distinct elements =
10
30
40
50
70
90
100

示例

我们来看看另一个示例 -

import java.util.*;
public class Demo {
   public static void main(String[] args) {
      List<Integer> list = Arrays.asList(10, 30, 40, 40, 50, 70, 90, 90, 100);
      System.out.println("List = "+list);
      System.out.println("Count of distinct elements = "+(list.stream().distinct().count()));
      System.out.println("Displaying only the distinct elements = ");
      list.stream().distinct().forEach(System.out::println);
   }
}

输出

List = [10, 30, 40, 40, 50, 70, 90, 90, 100]
Count of distinct elements = 7
Displaying only the distinct elements =
10
30
40
50
70
90
100

更新于: 25-9-2019

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