Java BitSet stream()用法及代码示例

Java BitSet类的stream()方法用于为BitSet中包含的每个位返回索引流。索引以升序返回。流的大小是BitSet设置状态下的位数，它等于cardinality()方法返回的值。

用法:

public IntStream stream()

参数：该方法不带任何参数。
返回值：该方法为BitSet中包含的每个位返回索引流。

以下程序说明了java.util.BitSet.stream()方法的用法：
示例1:

// Java code to illustrate stream() 
import java.util.*; 
import java.util.stream.IntStream; 
  
public class BitSet_Demo { 
    public static void main(String args[]) 
    { 
        // Creating an empty BitSet 
        BitSet init_bitset = new BitSet(); 
  
        // Use set() method to add elements into the Set 
        init_bitset.set(10); 
        init_bitset.set(20); 
        init_bitset.set(30); 
        init_bitset.set(40); 
        init_bitset.set(50); 
  
        // Displaying the BitSet 
        System.out.println("BitSet: " + init_bitset); 
  
        // Creating an IntStream 
        IntStream indice_Stream = init_bitset.stream(); 
  
        // Displaying the working 
        System.out.println("The BitSet: " + init_bitset); 
        System.out.println("The stream of indices: "
                           + indice_Stream); 
        System.out.println("The size of the stream: "
                           + indice_Stream.count()); 
    } 
}

输出：

BitSet: {10, 20, 30, 40, 50}
The BitSet: {10, 20, 30, 40, 50}
The stream of indices: java.util.stream.IntPipeline$Head@4eec7777
The size of the stream: 5

示例2:

// Java code to illustrate stream() 
import java.util.*; 
import java.util.stream.IntStream; 
  
public class BitSet_Demo { 
    public static void main(String args[]) 
    { 
        // Creating an empty BitSet 
        BitSet init_bitset = new BitSet(); 
  
        // Use set() method to add elements into the Set 
        init_bitset.set(40); 
        init_bitset.set(25); 
        init_bitset.set(31); 
        init_bitset.set(100); 
        init_bitset.set(121); 
        init_bitset.set(400); 
        init_bitset.set(2); 
        init_bitset.set(15); 
        init_bitset.set(106); 
        init_bitset.set(55); 
  
        // Displaying the BitSet 
        System.out.println("BitSet: " + init_bitset); 
  
        // Creating an IntStream 
        IntStream indice_Stream = init_bitset.stream(); 
  
        // Displaying the working 
        System.out.println("The BitSet: " + init_bitset); 
        System.out.println("The stream of indices: "
                           + indice_Stream); 
        System.out.println("The size of the stream: "
                           + indice_Stream.count()); 
    } 
}

输出：

BitSet: {2, 15, 25, 31, 40, 55, 100, 106, 121, 400}
The BitSet: {2, 15, 25, 31, 40, 55, 100, 106, 121, 400}
The stream of indices: java.util.stream.IntPipeline$Head@4eec7777
The size of the stream: 10

相关用法

注：本文由纯净天空筛选整理自Chinmoy Lenka大神的英文原创作品 BitSet stream() Method in Java with Examples。非经特殊声明，原始代码版权归原作者所有，本译文未经允许或授权，请勿转载或复制。