public class arrayadd {

   // Version #1; assumes a1 and a2 are the same length
   public static int[] add(int[] a1, int[] a2) {
      int[] temp;

      temp = new int[a1.length];

      for (int i=0; i<=a1.length-1; i++)
        temp[i] = a1[i] + a2[i];

      return temp;
   }

   public static void main(String[] args) {

      int[] a = {20,10,5};
      int[] b = {10,20,30};
      int[] c;

      c = add(a,b);
      for (int i=1; i<=c.length-1; i++)
         System.out.println(c[i]);
   }
}





   // Version #2; doesn't assume a1 and a2 are the same length
   public static int[] add(int[] a1, int[] a2) {
      int[] temp;
      int min;

      min = a1.length;
      if (a2.length < min)
         min = a2.length;

      temp = new int[min];

      for (int i=0; i<=min-1; i++)
        temp[i] = a1[i] + a2[i];

      return temp;
   }