Thread: Multiple Java Programs That I need Help with

Question 1:

What is the output of the following code?

public class Question02b{
       public static void main(String[] args){ SuperClass superA = new
           SuperClass(); SuperClass superB = new SubClass(); SubClass
           sub = new SubClass(); System.out.println(superA.method());
           System.out.println(superB.method());
           System.out.println(sub.method());
           System.out.println(superB.method(1));
           System.out.println(superB.method(1.4));
}}
   class SuperClass { public static String method(){
           return "SuperClass"; } public String method(double a){
    return "SuperClass"; } }
   class SubClass extends SuperClass{ public static String method(){
           return "SubClass";
}
public String method(int a){
    return
"SubClass"; } }
Question 3 is on page 4

Question 2:
What are the possible types of objects at runtime that veg in the method omnivore may be pointing
to? And what would the output be?

public class Question03 { void omnivore(Vegetable veg){ veg.eat(); } }
    abstract class Vegetable { protected int roots = 7; public void eat(){
        slice(); saute(); } public static void saute(){
        System.out.println("Sizzle!"); } public abstract void slice();
}
    class Tuber extends Vegetable { Tuber(){ mash(); } public void slice(){
        System.out.println("Chop!"); mash();} public void mash(){
        System.out.println("Glop! " + roots); }
}
    class Potato extends Tuber
        { Potato(){ roots = 59; }
        public void eat(){
if(this.equals(new Potato())) System.out.println("Spud!"); else
    System.out.println("Spudless!");
            super.eat(); } public static void saute(){
        System.out.println("Crisps!"); } public void mash(){
        System.out.println("Creamy! " + roots); }
}

Question 3:
There are two errors in this class, what are they and how can they be fixed?

public class Question04c extends OtherClass{
protected int answer(int i) throws DumbQuestionException { if(i < 0){ throw
    new DumbQuestionException(); } else return 6; } }
class OtherClass{ public int answer(int i){ return i; } }
    class DumbQuestionException extends Exception{ }

Do you have any specific question on your assignment?

Originally Posted by jps

Do you have any specific question on your assignment?

I did question 1
But i still am not sure about Questions 2 and 3

My answers are:

Q2:
It leads to roots, eat, slice, sauté, and mash
Output:
Sizzle!, Chop!, Glop! + 7, Spud!, Spudless!, Crisps, Creamy! + 59

Q3:
You are attempting to assign weaker privileges when it was public.