📜  Java位集 |基数()

📅  最后修改于: 2022-05-13 01:55:34.493000             🧑  作者: Mango

Java位集 |基数()

BitSet 是在Java.util 包中定义的一个类。它创建一个由 0 和 1 表示的位数组。

句法

public int cardinality()

解释:

该方法返回此 BitSet 中 1 的数量。

例子:

Input : 
set1 : {1, 2, 4}
set2 : {}

Output : 
3
0
Java
// Java program illustrating Bitset Class functions.
import java.util.*;
public class GFG {
    public static void main(String[] args)
    {
        // Constructors of BitSet class
        BitSet bs1 = new BitSet();
        BitSet bs2 = new BitSet();
        BitSet bs3 = new BitSet();
 
        /* set is BitSet class method
        explained in next articles */
        bs1.set(0);
        bs1.set(1);
        bs1.set(2);
        bs1.set(4);
 
        // assign values to bs2
        bs2.set(4);
        bs2.set(6);
        bs2.set(5);
        bs2.set(1);
        bs2.set(2);
        bs2.set(3);
 
        // Printing the 2 Bitsets
        System.out.println("bs1 : " + bs1);
        System.out.println("bs2 : " + bs2);
        System.out.println("bs3 : " + bs3);
 
        // Performing logical AND
        // on bs2 set with bs1
        System.out.println(bs1.cardinality());
        System.out.println(bs2.cardinality());
        System.out.println(bs3.cardinality());
    }
}


输出:
bs1 : {0, 1, 2, 4}
bs2 : {1, 2, 3, 4, 5, 6}
bs3 : {}
4
6
0

相关文章 :

  1. Bitset 类示例集 1
  2. Bitset 类示例集 2
  3. Bitset 类示例集 3