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Java Program to Compare two Boolean Arrays

  • Last Updated : 17 Dec, 2020

Two arrays are equal if they contain the same elements in the same order. In java, we can compare two Boolean Arrays in 2 ways:

  • By using Java built-in method that is .equals() method.
  • By using the Naive approach.

Examples:

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Input : A = [true , true , false]
        A1 = [true, true, false]

Output:  Both the arrays are equal.

Input : A = [true, true, false]
           A1 = [true, false, true]

Output:  Both the arrays are not equal.

Method 1:

 Array class in Java provides the method Arrays.equals() to check whether two arrays are equal or not.



Syntax:

public static boolean equals(boolean[] a, boolean[] a1)

Parameters:

a - one array to be tested for equality
a1 - another array to be tested for equality

Returns: It returns true if both the arrays are equal else returns false.

Code:

Java




// Java Program to Compare two Boolean
// Arrays using built-in function
  
import java.util.Arrays;
  
class GFG {
    public static void main(String[] args)
    {
  
        // initializing both the boolean arrays
        boolean[] a = new boolean[] { true, true, false };
        boolean[] a1 = new boolean[] { true, true, false };
  
        // Displaying Array1
        System.out.println("Array1...");
        
        for (int i = 0; i < a.length; i++) 
        {
            System.out.println(a[i]);
        }
        
        // Displaying Array2
        System.out.println("Array2...");
        for (int j = 0; j < a1.length; j++) 
        {
            System.out.println(a1[j]);
        }
  
        // comparing array1 and array2
        boolean result = Arrays.equals(a, a1);
  
        if (result) 
        {
            System.out.println("Both the arrays equal ");
        }
        else
        {
            System.out.println(
                "Both the arrays not equal ");
        }
    }
}
Output
Array1...
true
true
false
Array2...
true
true
false
Both the arrays equal

Method 2:

  • In this, we will use the Naive approach to compare two arrays.
  • We can run a for loop and check every element of the array and compare each one of them.

Java




// Java Program to Compare two Boolean
// Arrays using Naive approach
  
import java.io.*;
  
class GFG {
    public static void main(String[] args)
    {
        // initializing both the boolean arrays
        boolean[] a = new boolean[] { true, true, false };
        boolean[] a1 = new boolean[] { true, true, false };
  
        // Displaying Array1
        System.out.println("Array1...");
        for (int i = 0; i < a.length; i++) 
        {
            System.out.println(a[i]);
        }
        
        // Displaying Array2
        System.out.println("Array2...");
        for (int j = 0; j < a1.length; j++) 
        {
            System.out.println(a1[j]);
        }
        
        // Comparing both the arrays
        for (int i = 0; i < a.length; i++)
        {
            // if any element is found different we will
            // print our ans and exit the program.
            if (a[i] != a1[i]) 
            {
                System.out.println(
                    "Both the arrays equal ");
                System.exit(0);
            }
        }
        
        System.out.println("Both the arrays equal ");
    }
}
Output
Array1...
true
true
false
Array2...
true
true
false
Both the arrays equal



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