//------------
// Introduction to Programming Using Java: An Object-Oriented Approach
//	Arnow/Weiss
//------------

//------------
// Chapter 8 / Section 8.11 / Page 299
//	Using the Set class
//------------ 

//------------
// Notes
//	- This class requires the Set class.
//	- !!!! Differences from the code in the text !!!!
//		The function header of the 'main' method has an extra pair of '()'
//		The text uses the a method 'toString' which is not defined
//			for the Set class until the subsequent Java Interlude.
//			the code below uses the Set class print method to
//			print out the sets.
//------------

class useSet {
	public static void main(String [] args) {
		Set s1 = new Set();
		s1.addElement("A");
		s1.addElement("B");
		s1.addElement("C");
		s1.addElement("A");
		s1.print(System.out);
		System.out.println();
		Set s2 = new Set();
		s2.addElement("B");
		s2.addElement("C");
		s2.addElement("D");
		s2.addElement("D");
		s2.print(System.out);
		System.out.println();
		s1.union(s2).print(System.out);
		System.out.println();
		s1.intersection(s2).print(System.out);
		System.out.println();
	}

}