MainClass.java Source code

Introduction

Here is the source code for MainClass.java

Source

/*
--------------union--------------
A
B
C
--------------intersection--------------
A
B*/
import java.util.Collection;
import java.util.HashSet;
import java.util.Iterator;
import java.util.Set;
import java.util.TreeSet;

public class MainClass {
    public static void main(String[] args) {

        // Create two sets.
        Set s1 = new HashSet();
        s1.add("A");
        s1.add("B");
        s1.add("C");

        Set s2 = new HashSet();
        s2.add("A");
        s2.add("B");

        Set union = new TreeSet(s1);
        union.addAll(s2); // now contains the union

        print("union", union);

        Set intersect = new TreeSet(s1);
        intersect.retainAll(s2);

        print("intersection", intersect);

    }

    protected static void print(String label, Collection c) {

        System.out.println("--------------" + label + "--------------");

        Iterator it = c.iterator();
        while (it.hasNext()) {
            System.out.println(it.next());
        }
    }
}