Question

USING JAVA ONLY - THE NEW ARRAY IS NOT JUST THE VALUES IN INCREASING ORDER

Merge two 1D arrays into a single array. take one value from each array at a time. The new array takes a value from array 1, than one from array two, and keeps repeating until all values are in the new array.

Sample:

array 1: 1,2,3,4,5

array 2: 2,4

new array: 1,2,2,4,3,4,5

Sample 2:

array 1: is 8,2,4,7,2,6,2

array 2: 4,7,3

new array: 8,4,2,7,4,3,7,2,6,2

Answer 1

import java.util.Scanner;

public class MergeIntArrays {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);

        System.out.print("array 1: ");
        String[] s1 = scanner.nextLine().split(",");
        int arr1[] = new int[s1.length];
        for(int i = 0;i<arr1.length;i++){
            arr1[i] = Integer.parseInt(s1[i]);
        }

        System.out.print("array 2: ");
        String[] s2 = scanner.nextLine().split(",");
        int arr2[] = new int[s2.length];
        for(int i = 0;i<arr2.length;i++){
            arr2[i] = Integer.parseInt(s2[i]);
        }

        int arr[] = new int[arr1.length+arr2.length];
        int i = 0, k =0;
        while(i<arr1.length && i<arr2.length){
            arr[k++] = arr1[i];
            arr[k++] = arr2[i];
            i++;
        }

        while(i<arr1.length){
            arr[k++] = arr1[i++];
        }

        while(i<arr2.length){
            arr[k++] = arr2[i++];
        }

        System.out.print("new array: ");
        for(int j = 0;j<arr.length;j++){
            if(j == 0){
                System.out.print(arr[j]);
            }
            else{
                System.out.print(","+arr[j]);
            }
        }
        System.out.println();
    }
}