For the questions below, consider the following class definition:
public class AClass
{
protected int x;
protected int y;
public AClass(int a, int b)
{
x = a;
y = b;
}
public int addEm( )
{
return x + y;
}
public void changeEm( )
{
x++;
y--;
}
public String toString( )
{
return "" + x + " " + y;
}
}
-Which of the following would best redefine the toString method for BClass?
A) public String toString(int z) {
Return " " + x + " " + y + " " + z;
}
B) public String toString( ) {
Return super.toString( );
}
C) public String toString( ) {
Return super.toString( ) + " " + z;
}
D) public String toString( ) {
Return super.toString( ) + " " x + " " + y + " " + z;
}
E) public String toString( ) {
Return " " + x + " + y + " " + z;
}

Question

Quizplus · Accepted Answer

C) The best way to redefine a method is to reuse the parent class'method and supplement it with the code needed to handle the changes in the subclass. Answer C does this. Answer E accomplishes the same task, but does not reuse any of the parent class'code. Answer B returns only x and y, not z, and answer D returns x, y, x, y and z, while answer A is syntactically invalid because the toString method does not accept a parameter.

For the Questions Below, Consider the Following Class Definition