Java 中的 BitSet 流()方法，示例
原文:https://www . geesforgeks . org/bitset-stream-method-in-Java-with-examples/
Java BitSet 类的 stream()方法用于为 BitSet 中包含的每个位返回一个索引流。索引以递增的顺序返回。流的大小是 BitSet 的 set 状态的位数，等于基数()方法返回的值。
语法:
public IntStream stream()
参数:该方法不取任何参数。 返回值:该方法为位集中包含的每个位返回一个索引流。
以下程序说明了 java.util.BitSet.stream()方法的工作: 程序 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());
}
}
Output:
BitSet: {10, 20, 30, 40, 50}
The BitSet: {10, 20, 30, 40, 50}
The stream of indices: java.util.stream.IntPipeline$Head@4eec7777
The size of the stream: 5
程序 2:
// Java code to illustrate stream()
import java.util.*;
import java.util.stream.IntStream;
public class BitSet_Demo {
public static void main(String args[])
{
// Creating an empty BitSet
BitSet init_bitset = new BitSet();
// Use set() method to add elements into the Set
init_bitset.set(40);
init_bitset.set(25);
init_bitset.set(31);
init_bitset.set(100);
init_bitset.set(121);
init_bitset.set(400);
init_bitset.set(2);
init_bitset.set(15);
init_bitset.set(106);
init_bitset.set(55);
// Displaying the BitSet
System.out.println("BitSet: " + init_bitset);
// Creating an IntStream
IntStream indice_Stream = init_bitset.stream();
// Displaying the working
System.out.println("The BitSet: " + init_bitset);
System.out.println("The stream of indices: "
+ indice_Stream);
System.out.println("The size of the stream: "
+ indice_Stream.count());
}
}
Output:
BitSet: {2, 15, 25, 31, 40, 55, 100, 106, 121, 400}
The BitSet: {2, 15, 25, 31, 40, 55, 100, 106, 121, 400}
The stream of indices: java.util.stream.IntPipeline$Head@4eec7777
The size of the stream: 10
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