public class ClassTesting
{
	public static void main(String[] args)
	{
		Student s1, s2, s3;
		s1 = new Student();  //test default constructor
		System.out.println(s1);
		s2 = new Student("Johnny", "Appleseed", 523341l); //note the 'l' to indicate a long

		s3 = s2;  //don't need to instantiate s3. Have it simply point to s2.
		s3.setFirstName("Barney");  //will also change the state of s2 since both s1 and s2 point to the same object

		System.out.println(s2);

		if ( s1.equals(s2) ) //test equals method
			System.out.println("s1 and s2 objects have the same state.");
		else
			System.out.println("s1 and s2 objects do not have the same state.");

		Student s4 = new Student(s3); //test copy constructor

		//confirm that copy constructor works
		if ( s3.equals(s4) ) //test equals method
			System.out.println("s3 and s4 objects have the same state.");
		else
			System.out.println("s3 and s4 objects do not have the same state.");

		//confirm that '==' compares addresses NOT state!
		if ( s3==s4 )
			System.out.println("s3 and s4 are pointing to the same object.");
		else
			System.out.println("s3 and s4 are not pointing to the same object.");


		System.out.println();
	} //end method main()

} //end class ClassTesting