public class EqualityRef {
	public static void main(String[] args) {	
		String message1, message2, message3;
		int age1, age2;
		
		age1 = 50;
		age2 = 50;
		if (age1 == age2) {
			System.out.println("age1 and age2 equal");
		} else {
			System.out.println("age1 and age2 are different");
		} 
		
		message1 = new String("Hello");  
		message2 = new String("Hello");
		message3 = message2;
		System.out.println(message1.toString());
		System.out.println(message2.toString());
		
		if (message1.toString() == message2.toString()) {
			System.out.println("message1 and message2 equal");
		} else {
			System.out.println("message1 and message2 are different");
		}
		
		if (message2.equals(message3)) {
			System.out.println("message2 and message3 equal");
		} else {
			System.out.println("message2 and message3 are different");
		}
	}
}