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public class Cat {
	  private int age;
	  private String name;
	  private Cat friend;

	  public Cat(String name, int age) {
		    this.name = name;
		    this.age = age;
		    this.friend = null;
	  }

	  public String getName() {
		    return name;
	  }

	  public Cat getFriend() {
		    return friend;
	  }
	
	  public void setFriend(Cat friend) {
		    this.friend = friend;
	  }

	  public String sayHello(String aboutMe) {
		    return "Hello World!  My name is " + name 
				+ " and I am " + age
        + " years old."
				 + " I am " + aboutMe + ".";
	  }
}

public class CatsTheMusical {

	  public static void main(String[] args) {
		    Cat mist = new Cat("Mr. Mistoffelees", 8);
	    System.out.println(mist.sayHello("magical"));
	    Cat garf = new Cat("Garfield", 12);
	    System.out.println(garf.sayHello("tired/hungry"));
	    mist.setFriend(garf);
	    System.out.println(mist.getName() + " and " + garf.getName()
	        		+ " are friends? " + areFriends(mist, garf));
	    garf.setFriend(mist);
	    System.out.println(mist.getName() + " and " + garf.getName()
	        		+ " are friends? " + areFriends(mist, garf));
	  }
	
	  public static boolean areFriends(Cat cat1, Cat cat2) {
		if    if (cat1.getFriend() != null && cat2.getFriend() != null) {
			      return cat1.getFriend() == cat2 && cat2.getFriend() == cat1;
		    }
		    return false;
	  }
}