How can I move values around from two separate arrays

import java.util.Scanner;  
public class Test 
{
   public static void main(String args[])
   {
   Scanner sc=new Scanner(System.in);  
   int [] ar = new int[4];
   int [] ar1 = new int[4];
   int [] res = new int[8];
   int i;
   int k;
   for (i=0;i<4;i++)
   {
      System.out.println("Enter a number");  
      ar[i]=sc.nextInt();  
   }
   for (i=0;i<4;i++)
   {
      System.out.println("Enter a number");  
      ar1[i]=sc.nextInt();  
   }
   for (k=0,i=0;i<4;i++,k=k+2)
   {
       res[k]=ar[i];
   }
   for (k=1,i=0;i<4;i++,k=k+2)
   {
       res[k]=ar1[i];
   }
   for (i=0;i<8;i++)
   {
      System.out.print(res[i]+" ");  
   }
 }
}

Enter a number
0
Enter a number
1
Enter a number
2
Enter a number
3
Enter a number
4
Enter a number
5
Enter a number
6
Enter a number
7
0 4 1 5 2 6 3 7