// applier.java


// Apply method f to each element of array A and put the results in B.

abstract class ArrayApplier {

  public abstract int f(int x);

  public void ApplyToArray(int[] A, int[] B) {
     for (int i = 0; i < A.length; i++) B[i] = f(A[i]); }

}  // end Applier

// applyIncr overwrites the abstract method "f" with the increment function.

class applyIncr extends ArrayApplier {

   public int f(int i) { return i+1; }

} // end applyIncr

// applyDouble overwrites the abstract method "f" with the doubling function.

class applyDouble extends ArrayApplier {

   public int f(int i) { return 2*i; }

} // end applyDouble

// applier applies applyIncr and applyDouble to an array


public class applier {
public static void main(String args[]) {
int A[] = new int[] { 1,2,3 };
int B[] = new int[3];
applyIncr Incr = new applyIncr();
applyDouble Doub = new applyDouble();
Incr.ApplyToArray(A,B);
System.out.println(B[0] + " " + B[1] + " " + B[2]);
Doub.ApplyToArray(A,B);
System.out.println(B[0] + " " + B[1] + " " + B[2]);
}


} // end applier