Java: HandyPerson Interface Exercises - 1

Name ________________________________________

The following questions should be answered in referring to HandyPerson Example .

What is printed by the following?

If it is erroneous, write C for syntax (compilation) error or R for runtime error (ie, it crashes).

1. What does this print? ____________________________________

       hp = new HandyPerson("Jill");
       System.out.println(hp);
       

2. What does this print? ____________________________________

       hu = new HandyPerson("Mike");    // Assign HandyPerson to Human
       System.out.println(hu);
       

3. What does this print? ____________________________________

       hp = new Human("Betty");         // Human to HandyPerson
       System.out.println(hp);
       

4. What does this print? ____________________________________

       hu = new HandyPerson("Chris");  
       System.out.println(hu.changeBulb()); // ChangeBulb
       

5. What does this print? ____________________________________

       hu = new NobodySpecial("Tom");   // Assign NobodySpecial to Human
       System.out.println(hu);
       

6. What does this print? ____________________________________

       hp = new NobodySpecial("Bill");   // Assign NobodySpecial to HandyPerson
       System.out.println(hp);
       

7. What does this print? ____________________________________

       ns = new HandyPerson("Sally");   // Assign HandyPerson to NobodySpecial
       System.out.println(ns);
       

8. What does this print? ____________________________________

       pl = new Plumber("Andrew");      // Plumber
       System.out.println(pl);
       

9. What does this print? ____________________________________

       pl = new HandyPerson("Nancy");   // HandyPerson to Plumber
       hp = (HandyPerson)pl;
       System.out.println(hp);
       

10. What does this print? ____________________________________

        ob = new HandyPerson("Ralf");   // HandyPerson to Object
        System.out.println(ob);