Write a program to find the common elements between two arrays of integers

This Java program prompts the user to enter the limits for two arrays, then asks for input to fill the arrays. It then uses nested loops to find and print out any elements that are common to both arrays. Here's how the program works:

The program starts by importing the java.util.Scanner and java.util.Arrays classes.
The program defines a class called Array_Common.
Inside the class, the program defines a main method, which is the entry point for the program.
The program creates a new Scanner object, which is used to read input from the user.
The program prompts the user to enter the limits for the first and second arrays using System.out.println().
The program reads in the values for the array limits using input.nextInt().
The program creates two arrays called a and b with the sizes specified by the user.
The program uses two for loops to fill the arrays with input values from the user.
The program prints out the contents of both arrays using Arrays.toString().
The program prints out a message indicating that it is looking for common elements.
The program uses nested for loops to compare each element in the first array with every element in the second array.
If the current element in the first array is equal to the current element in the second array, the program prints out the element.
The program ends.

Overall, this program is a simple example of how to use nested loops to compare elements in two arrays in Java. It is useful for beginners who are just learning how to use loops and arrays in Java.

Source Code

import java.util.Scanner;
import java.util.Arrays; 
public class Array_Common
{
	public static void main(String[] args) 
    {
		Scanner input =new Scanner(System.in);
		System.out.print("Enter the First Array Limit :");
		int n =input.nextInt();
		System.out.print("Enter the Second Array Limit :");
		int m =input.nextInt();
		int [] a =new int[n];
		int [] b =new int[m];
        for(int i=0;i<n;i++)
        {
            System.out.printf("Element of a[%d] :",i);
            a[i]=input.nextInt();
        }
        for(int i=0;i<m;i++)
        {
            System.out.printf("Element of b[%d] :",i);
            b[i]=input.nextInt();
        } 
		System.out.println("Array1 : "+Arrays.toString(a));
		System.out.println("Array2 : "+Arrays.toString(b)); 
		System.out.println("\nCommon Array Element is..\n");
        for (int i = 0; i < n; i++)
        {
            for (int j = 0; j < m; j++)
            {
                if(a[i] == (b[j]))
                {                 
			System.out.println(a[i]);
                }
            }
        } 
    }
}

Output

Enter the First Array Limit :5
Enter the Second Array Limit :5
Element of a[0] :10
Element of a[1] :20
Element of a[2] :30
Element of a[3] :40
Element of a[4] :50
Element of b[0] :10
Element of b[1] :30
Element of b[2] :60
Element of b[3] :50
Element of b[4] :70
Array1 : [10, 20, 30, 40, 50]
Array2 : [10, 30, 60, 50, 70]

Common Array Element is..

10
30
50

Write a program to find the common elements between two arrays of integers

Source Code

Output

Example Programs

Array Programs in Java