Question

Write a method called alternate that accepts two Lists as its parameters and returns a new List containing alternating elements from the two lists, in the following order: • First element from first list • First element from second list • Second element from first list • Second element from second list • Third element from first list • Third element from second list If the lists do not contain the same number of elements, the remaining elements from the longer list should sit consecutively at the end. For example, for a first list of (1, 2, 3, 4, 5) and a second list of (6, 7, 8, 9, 10, 11, 12), a call of alternate(list1, list2) should return a list containing (1, 6, 2, 7, 3, 8, 4, 9, 5, 10, 11, 12). Use the two lists given here. java

Answer 1

Code:

import java.io.*;

public class Main
{
public static void main(String args[])
{
int array1[] = {1,2,3,4,5}; // Array1
int array2[] = {6, 7, 8, 9, 10, 11, 12}; // Array 2
int New[] = new int[array1.length+array2.length]; // New array with length of both above arrays
New=alternate(array1,array2,New); // Calling function to insert elements to new array
  
// Printint new array
for(int i=0;i<New.length;i++){
System.out.print(New[i]+" ");
}
System.out.println();
}
public static int[] alternate(int[] a,int[] b, int[] New){
int index=0; // index for new array
int i=0,j=0; // index for array1 and array2
  
// run loop until insert all elements in new array
while(index<New.length){
New[index++]=a[i++]; // inserting element from array1 and increasing their index
New[index++]=b[j++]; // inserting element from array2 and increasing their index
if(i==a.length){ // if index of array1 reaches ending
break; // break loop
}
if(j==b.length){ // if index of array2 reaches ending
break; // Break loop
}
}
  
//if all elements of array1 not inserted
if(i<a.length){
for(int ii=i;ii<a.length;ii++){
New[index++]=a[ii];
}
}
//if all elements of array2 not inserted
if(j<b.length){
for(int jj=j;jj<b.length;jj++){
New[index++]=b[jj];
}
}
return New; // Returning new array
}
}

SCREENSHOT

OUTPUT

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