Question

How many methods are effectively present in class C? In other words, if you have an instance of class C, how many erent methods can you invoke on it based on this diagram? List these methods and indicate, for each, whether it overrides a thod in the parent, is inherited from the parent, or is a brand new method in the child. (10pts) art II. + m1 (double): boolean + m2 (int): int -m3 (double): double + m1 (double): boolean + m2 (double): double + m3 (int): int + m4 (double): double

Answer 1

public class P
{
public boolean m1(double a){
System.out.println("m1 from P "+a);
return true;
}
public int m2(int a){
System.out.println("m2 from P "+a);
return a;

}
public double m3(double a){
System.out.println("m3 from P "+a);
return a;

}
   public static void main(String[] args) {
   C c=new C();
   P p=new P();
   c.m1(10E7);
       c.m1(10);
       c.m2(10E7);
       c.m2(10);
       c.m3(10);
       c.m3(10E7);
       c.m4(10E7);

   }
}
class C extends Main{
public boolean m1(double a){
System.out.println("m1 from C "+a);
return true;

}
public double m2(double a){
System.out.println("m2 from C "+a);
return a;

}
  
public int m3(int a){
System.out.println("m3 from C "+a);
return a;
}
public double m4(double a){
System.out.println("m4 from C "+a);
return a;
}
  
}

ml from C 1.0E8 ml from C 10.0 m2 from C 1.OE8 m2 from P 10 m3 from C 1O m3 from P 1.OE8 m4 from C 1.OE8

Consider the above program

The list of methods available for C class are below

1. m1(double) - Not inherited from Parent .It is the child class method.Because it overrides the one present in parent.

2. m2(int) -Inherited from parent class.Since the argument in the child class is different datatype for m2 ,this wont be overriden

3.m2(double) -Brand new method from child class.same reason as step 2

4. m3(double) - From parent class P. since the argument data type is different for the m3 method in child it wont be overriden

5.m3(int) -Brand new method in child class. Same reason as above

6. m4(double) -Since its a new method present only in child class it is called from child class only