Java中的 BitSet equals() 方法及示例

Java BitSet 类的 equals() 方法用于检查两个位集之间的相等性。它验证作为参数传递的一个集合的元素是否等于该集合的元素。如果位集匹配，则该方法返回 true，否则返回 false。

句法：

Bit_Set1.equals(Bit_Set2)

参数：该方法接受一个位集类型的参数Bit_Set2 ，并引用要与该位集检查其相等性的集。

返回值：如果相等性对两个对象集都成立，则该方法返回 true，否则返回 false。

下面的程序说明了Java中 BitSet equals() 方法的工作原理。
方案一：

// Java code to illustrate equals()
import java.util.*;
  
public class BitSet_Demo {
    public static void main(String args[])
    {
        // Creating an empty BitSet
        BitSet bit_set1 = new BitSet();
        BitSet bit_set2 = new BitSet();
  
        // Use set() method to add elements into the Set
        bit_set1.set(40);
        bit_set1.set(25);
        bit_set1.set(80);
        bit_set1.set(95);
        bit_set1.set(5);
  
        // Use set() method to add elements into the Set
        bit_set2.set(25);
        bit_set2.set(40);
        bit_set2.set(5);
        bit_set2.set(95);
        bit_set2.set(80);
  
        // Displaying the BitSets
        System.out.println("First BitSet: " + bit_set1);
        System.out.println("Second BitSet: " + bit_set2);
  
        // Checking for equality
        System.out.println("Are the sets equal? "
                           + bit_set1.equals(bit_set2));
    }
}

输出：

First BitSet: {5, 25, 40, 80, 95}
Second BitSet: {5, 25, 40, 80, 95}
Are the sets equal? true

方案二：

// Java code to illustrate equals()
import java.util.*;
  
public class BitSet_Demo {
    public static void main(String args[])
    {
        // Creating an empty BitSet
        BitSet bit_set1 = new BitSet();
        BitSet bit_set2 = new BitSet();
  
        // Use set() method to add elements into the Set
        bit_set1.set(40);
        bit_set1.set(25);
        bit_set1.set(80);
        bit_set1.set(95);
        bit_set1.set(5);
  
        // Use set() method to add elements into the Set
        bit_set2.set(10);
        bit_set2.set(20);
        bit_set2.set(30);
        bit_set2.set(40);
        bit_set2.set(50);
  
        // Displaying the BitSets
        System.out.println("First BitSet: " + bit_set1);
        System.out.println("Second BitSet: " + bit_set2);
  
        // Checking for equality
        System.out.println("Are the sets equal? "
                           + bit_set1.equals(bit_set2));
    }
}

输出：

First BitSet: {5, 25, 40, 80, 95}
Second BitSet: {10, 20, 30, 40, 50}
Are the sets equal? false