
Concept explainers
Explanation of Solution
Given program:
// Superclass
public class Vehicle// Line 1
{
// Method header
public abstract double getMilesPerGallon();// Line 2
(other methods...) }
// Subclass
public class Car extends Vehicle// Line 3
{
// Variable declaration
private int mpg; // Line 4
// Method header
public int getMilesPerGallon();// Line 5
{
return mpg; // Line 6
}
(other method...)
}
Error in the given code:
In the given program, the error is present in the Line 5.
- There is a data type mismatch in the method header statement.
- The method “getMilesPerGallon” in the subclass “Car” should return “double” type value...
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