Write a method called append that accepts two integer arrays as parameters and r

Question

Write a method called append that accepts two integer arrays as parameters and returns a new array that contains the result of appending the second array's values at the end of the first array. For example, if arrays list 1 and list 2 store {2, 4, 6} and {1, 2, 3, 4, 5} respectively. the call of append (list 1, list 2) should return a new array containing {2, 4, 6, 1, 2, 3, 4, 5}. If the call instead had been append(list 2, list 1), the method would return an array containing {1, 2, 3, 4, 5, 2, 4, 6}.

Explanation / Answer

import java.util.*;
import java.lang.*;

class AppendArrays
{
   public static void main (String[] args)
   {
       int i;
       Scanner scan = new Scanner(System.in);
      
       System.out.println("Enter the size of list1");
       int size1 = scan.nextInt();    // enter size of list 1
        int[] list1 = new int[size1];  
      
       System.out.println("Enter the size of list2");
       int size2 = scan.nextInt();    // enter size of list 2
       int[] list2 = new int[size2];
      
       for(i=0;i<size1;i++)
       {
           list1[i] = scan.nextInt();   //input elements of list1
       }
       for(i=0;i<size2;i++)
       {
           list2[i] = scan.nextInt();   //input elements of list2
       }
       int[] list3 = append(list1,list2);    //method call
      
       for(i=0; i<list3.length; i++)
       System.out.print(list3[i]+" ");       //display elements of appended list
   }
   public static int[] append(int[] list1,int[] list2)
   {
       int[]list3 = new int[list1.length+list2.length];
       int i,j;
       for(i=0; i<list1.length; i++)
        list3[i] = list1[i];     //put all elements of list1 to list3

        for(j=0; j<list2.length; j++)
        list3[i++]=list2[j];    //put all elements of list2 to list3 appended at index i
        return list3;
   }
}

output:

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