Java End Term: 30 April 2023, Set QPD1-S1 (January 2023 term)

1 1  class ClassOne{
2 2      public void methodOne(){
3 3          // ...
4 4      }
5 5      public void methodTwo(){
6 6          // ...
7 7          methodOne();
8 8          // ...
9 9      }
1010  }
1111  class ClassTwo{
1212      public static void methodThree(){
1313          // ...
1414          ClassOne c = new ClassOne();
1515          c.methodTwo();
1616          // ...
1717      }
1818      public static void main(String[] args) {
1919          // ...
2020          methodThree();
2121      }
2222  }

1class Equipment implements Cloneable{
2    String type;
3    // Constructor
4    // Accessor method getType()
5    // Mutator method setType()
6    public Equipment clone() throws CloneNotSupportedException{
7        return (Equipment)super.clone();
8    }
9}
10class Lab implements Cloneable{
11    Equipment eqp;
12    String name;
13    // Constructor
14    // Mutator method setName()
15    public Lab clone() throws CloneNotSupportedException{
16        Lab lb = (Lab)super.clone();
17        lb.eqp = lb.eqp.clone();
18        return lb;
19    }
20    public String toString(){
21        return eqp.getType() + ":" + name;
22    }
23}
24public class Test {
25    public static void main(String[] args) {
26        Lab lb1 = new Lab(new Equipment("Computer"), "Computer");
27        try{
28            Lab lb2 = lb1.clone();
29            lb2.eqp.setType("Milling Machine");
30            lb2.setName("Mechanical");
31            System.out.println(lb1);
32            System.out.println(lb2);
33        }
34        catch(Exception e){
35            System.out.println(e);
36        }
37    }
38}

1class Animal{
2    public void legs(){
3        System.out.println("Number of legs are not known");
4    }
5    public void wings(){
6        System.out.println("Wings may exist");
7    }
8}
9class Dog extends Animal{
10    public void legs(){
11        System.out.println("Four legs");
12    }
13}
14class Ostrich extends Animal{
15    public void legs(){
16        System.out.println("Two legs");
17    }
18    public void wings(){
19        System.out.println("Two wings");
20    }
21}
22public class Test{
23    static void show(Animal[] a){
24      for(int i = 0; i < a.length; i++){
25          a[i].legs();
26          a[i].wings();
27      }
28    }
29    public static void main(String[] args){
30        Animal[] a = {new Dog(), new Ostrich()}; // LINE 1
31        show(a);
32    }
33}