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JAVA CERTIFICATION QUESTION: Enum and abstract member

· ocp,java


What is the output?

  • A. Compilation fails in enum Score
  • B. Compilation fails in class Main
  • C. 0
  • D. 1
  • E. 10
  • F. 11



#java #certificationquestion #ocp

Enum DOWN constant is rewritten with an anonymous class. But not the PLUS constant.

It is a compile-time error according to JLS section 8.9.2:

"It is a compile-time error if an enum declaration E has an abstract method m as a member,

unless E has at least one enum constant and

all of E's enum constants have class bodies that provide concrete implementations of m."

So, in order to compile, UP must have a body like

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