Code Description Ch 07-1
Consider a class called ChessPiece. This class has two instance data, String type and int player. The variable type will store "King", "Queen", "Bishop", etc. and the int player will store 0 or 1 depending on whose piece it is. We wish to implement Comparable for the ChessPiece class. Assume that, the current ChessPiece is compared to a ChessPiece passed as a parameter.
Pieces are ordered as follows:
"Pawn" is a lesser piece to a "Knight"
a "Bishop" and "Knight" are equivalent for this example
both "Bishop" and "Knight" are lesser pieces to a "Rook"
a "Rook" is a lesser piece to a "Queen"
a "Queen" is a lesser piece to a "King".

-Refer to Code Description Ch 07-1: Which of the following method headers would properly define the method needed to make this class Comparable? (cp designates ChessPiece)
A) public boolean comparable(Object cp)
B) public int comparable(Object cp)
C) public int compareTo(Object cp)
D) public int compareTo()
E) public boolean compareTo(Object cp)

Question

Code Description Ch 07-1
Consider a class called ChessPiece.  This class has two instance data, String type and int player.  The variable type will store "King", "Queen", "Bishop", etc. and the int player will store 0 or 1 depending on whose piece it is.  We wish to implement Comparable for the ChessPiece class.  Assume that, the current ChessPiece is compared to a ChessPiece passed as a parameter.  
Pieces are ordered as follows:  
"Pawn" is a lesser piece to a "Knight" 
a "Bishop" and "Knight" are equivalent for this example
both "Bishop" and "Knight" are lesser pieces to a "Rook" 
a "Rook" is a lesser piece to a "Queen" 
a "Queen" is a lesser piece to a "King".

-Refer to Code Description Ch 07-1: Which of the following method headers would properly define the method needed to make this class Comparable? (cp designates ChessPiece)
A) public boolean comparable(Object cp)
B) public int comparable(Object cp)
C) public int compareTo(Object cp)
D) public int compareTo()
E) public boolean compareTo(Object cp)

Quizplus · Accepted Answer

The compareTo() method is the correct method header to implement Comparable for the ChessPiece class. The method should take an object of the same class as a parameter and return an integer value indicating the order of the two objects based on the ordering criteria defined in the problem statement.