Suppose Objects a and B Are from a User-Defined Class

question 40

Multiple Choice

Suppose objects a and b are from a user-defined class that implements the Comparable interface.What must be true about the return value of a.compareTo(b) for the compareTo method that this class implements?

• A)It must return 1 if a comes before b, 0 if they are the same, and -1 if a comes after b.
• B)It must return -1 if a comes before b, 0 if they are the same, and 1 if a comes after b.
• C)It must return a negative value if a comes before b, 0 if they are the same, and a positive value if a comes after b.
• D)It must return a positive value if a comes before b, 0 if they are the same, and a negative value if a comes after b.

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Definitions:

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