Share
Explore BrainMass

finding error in the java script

Given the following class definitions:
Public abstract class A2{
private int x;
public A2 (int a) {
this.x=a;
}
public int getX(){
return this.x;
}
public abstract double sameInfo();
}
public class B2 extends A2 {
private int y;
public B2 (int a, int b) {
super(a);
this.y = b;
}
public int getY () {
return this.y;
}
public double someInfo () {
return 100 * y;
}
}
public class C2 extends A2 {
private int z;
public C2 (int z){
super(5);
this.z=z;
}
public int getZ() {
return this.z;
}
public double sameInfo() {
return 100 * z * getZ();
}
}
public class D2 extends B2 {
public D2 (int D) {
super(10,20);
}
public double sameInfo () {
return 100 * getY() * getX();
}
}
You may assume that the following statements precede those in the table below:
A2 a1, a2 = new B2(2, 4);
B2 b1, b2 = new B2 (4, 6);
C2 c1, c2 = new C2 (5);
D2 d1, d2 = new D2 ();

1- The following statement:
b1= new A2(10);
Answer
A. Produce no error
B. Produces a SYNTAX (or compile-time) error
C. Produces an EXCEPTION (or run-time error)
D. Produces a LOGIC error

2- The following statement:
b2 = new D2();
Answer
A. Produce no error
B. Produces a SYNTAX (or compile-time) error
C. Produces an EXCEPTION (or run-time error)
D. Produces a LOGIC error

3- The following statement:
a2.getY();
Answer
A. Produce no error
B. Produces a SYNTAX (or compile-time) error
C. Produces an EXCEPTION (or run-time error)
D. Produces a LOGIC error

4- The following statement:
a2.someInfo();
Answer
A. Produce no error
B. Produces a SYNTAX (or compile-time) error
C. Produces an EXCEPTION (or run-time error)
D. Produces a LOGIC error

5- The following statement:
((D2)b2).getY();
Answer
A. Produce no error
B. Produces a SYNTAX (or compile-time) error
C. Produces an EXCEPTION (or run-time error)
D. Produces a LOGIC error

6- The following statement:
d1 = new B2(5,6);
Answer
A. Produce no error
B. Produces a SYNTAX (or compile-time) error
C. Produces an EXCEPTION (or run-time error)
D. Produces a LOGIC error.

Solution Preview

For the code in this solution I'm assuming that the "someinfo" method
in the B2 class was supposed to be "sameinfo". If that's not the case
then the code provided as "assume the following statements..." would
not compile and none of the rest of the problems would make any sense.

Problem 1:

This produces a syntax error for two reasons. First the code is
trying to create an A2 object but A2 is an abstract class and abstract
classes cannot ...

Solution Summary

The solution finds the error in a java script.

$2.19