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Java program to merge two one dimensional arrays

In this java program, we are going to learn how to merge two one dimensional arrays? By IncludeHelp Last updated : December 23, 2023

Problem statement

Given two one-dimensional arrays and we have to merge them using java program.

Example

Input:
Array 1 (elements will be read in program): 1 2 3 4 5 6 7 8 9 10
Array 2 (elements will be read in program): 11 12 13 14 15
Output:

New array (After merging elements)
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15

Program to merge two one-dimensional array elements in java

import java.util.Scanner;

public class ExArrayMerge {
  public static void main(String args[]) {
    // initialize the required array.
    int size1, size2, size, i, j, k;
    int arr1[] = new int[50];
    int arr2[] = new int[50];
    int merge[] = new int[100];
    Scanner scan = new Scanner(System.in);

    // enter size and elements of first array.
    System.out.print("Enter size of the first array : ");
    size1 = scan.nextInt();

    System.out.println("Enter elements of the first array : ");
    for (i = 0; i < size1; i++) {
      arr1[i] = scan.nextInt();
    }

    // enter size and elements of second array.
    System.out.print("Enter size of the second array : ");
    size2 = scan.nextInt();

    System.out.println("Enter elements of the second array : ");
    for (i = 0; i < size2; i++) {
      arr2[i] = scan.nextInt();
    }

    // merge both the array.
    System.out.print("Merging both the Arrays...\n");
    for (i = 0; i < size1; i++) {
      merge[i] = arr1[i];
    }

    size = size1 + size2;

    for (i = 0, k = size1; k < size && i < size2; i++, k++) {
      merge[k] = arr2[i];
    }

    // new array after merging.
    System.out.print("New array after merging is :\n");
    for (i = 0; i < size; i++) {
      System.out.print(merge[i] + "  ");
    }
  }
}

Output

Enter size of the first array : 10
Enter elements of the first array : 
1
2
3
4
5
6
7
8
9
10
Enter size of the second array : 5
Enter elements of the second array : 
11
12
13
14
15
Merging both the Arrays...
New array after merging is :
1  2  3  4  5  6  7  8  9  10  11  12  13  14  15