Question

List and explain the logical Error in the following program. Then submit the correct .java program.

public class square

{

private int sideLength;

private int area;

public Square(int initialLength)

{

sideLength = initialLength;

area = sideLength * sideLength;

}

public int area(){ return area;}

public void grow(){ sideLength = 2* sideLength;}

}

Answer 1

We should not calculate the area of square in the constructor as it is called only once. And if the length of square changes after the class is initialised then the area wont be changed

Correct Program:

public class square
{
private int sideLength;
private int area;
public square(int initialLength)
{
sideLength = initialLength;
}
public int area(){ return sideLength*sideLength;}
public void grow(){ sideLength = 2* sideLength;}
}