Question

Write a program in Java that will take as input two sets A and B, and returns a list of all functions from A to B.

Answer 1

SOURCE CODE

import java.util.*;
public class Set_example
{
   public static void main(String args[])
   {
       Set<Integer> a = new HashSet<Integer>();
       a.addAll(Arrays.asList(new Integer[] {21, 23, 22, 24, 28, 29, 20}));
       Set<Integer> b = new HashSet<Integer>();
       b.addAll(Arrays.asList(new Integer[] {21, 23, 27, 25, 24, 20, 27, 25}));

       // To find intersection
       Set<Integer> intersection = new HashSet<Integer>(a);
       intersection.retainAll(b);
       System.out.print("Intersection");
       System.out.println(intersection);

       // To find union
       Set<Integer> union = new HashSet<Integer>(a);
       union.addAll(b);
       System.out.print("Union");
       System.out.println(union);

       // To find the symmetric difference
       Set<Integer> difference = new HashSet<Integer>(a);
       difference.removeAll(b);
       System.out.print("SET Difference");
       System.out.println(difference);
   }
}

OUTPUT SCREENSHOT

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