Inheritance and Interfaces - Building Java Programs: A Back to Basics Approach - page 616

What is the output produced by the following code fragment?
public static void main(String[] args) {
Moo[] elements = {new Shoe(), new Flute(), new Moo(), new Blue()};
for (int i = 0; i < elements.length; i++) {
System.out.println(elements[i]);
elements[i].method1();
elements[i].method2();
System.out.println();
}
}
10. Using the classes from the previous problem, write the output that is produced by the following code fragment.
public static void main(String[] args) {
Moo[] elements = {new Blue(), new Moo(), new Shoe(), new Flute()};
for (int i = 0; i < elements.length; i++) {
elements[i].method2();
elements[i].method1();
System.out.println(elements[i]);
System.out.println();
}
}
11. Assume that the following classes have been defined:
1 public class Mammal extends SeaCreature {
2 public void method1() {
3 System.out.println("warm-blooded");
4 }
5 }
1 public class SeaCreature {
2 public void method1() {
3 System.out.println("creature 1");
4 }
5
6 public void method2() {
7 System.out.println("creature 2");
8 }
9
10 public String toString() {
11 return "ocean-dwelling";
12 }
13 }