单项选择题
A.Compilation fails.
B.An exception is thrown at runtime.
C.[608, 610, 612, 629] [608, 610]
D.[608, 610, 612, 629] [608, 610, 629]
E.[606, 608, 610, 612, 629] [608, 610]
F.[606, 608, 610, 612, 629] [608, 610, 629]
多项选择题 Givenaclasswhoseinstances,whenfoundinacollectionofobjects,aresortedbyusingthecompareTo()method,whichtwostatementsaretrue?()
多项选择题 A programmer is developing a class Key, that will be used as a key in a standard java.util.HashMap. Which two methods should be overridden to assure that Key works correctly as a key?()
单项选择题 What is the appropriate definition of the hashCode method in class Person?()