多项选择题
Which two statements are true about the hashCode method？（）
A.The hashCode method for a given class can be used to test for object equality and object inequality for that class.
B.The hashCode method is used by the java.util.SortedSet collection class to order the elements within that set.
C.The hashCode method for a given class can be used to test for object inequality， but NOT objecte quality， for that class.
D.The only important characteristic of the values returned by a hashCode method is that the distribution of values must follow a Gaussian distribution.
E.The hashCode method is used by the java.util.HashSet collection class to group the elements within that set into hash buckets for swift retrieval.
相关考题
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单项选择题
Given： Which statement is true？（）
A.The equals method does NOT properly override the Object.equals method.
B.Compilation fails because the private attribute p.name cannot be accessed in line 5.
C.To work correctly with hash-based data structures,this class must also implement the hashCode method.
D.When adding Person objects to a java.util.Set collection,the equals method in line 4 will prevent duplicates.
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单项选择题
Given： What is the result？（）
A.The value "4" is printed at the command line.
B.Compilation fails because of an error in line 5.
C.Compilation fails because of an error in line 9.
D.A NullPointerException occurs at runtime.
E.A NumberFormatException occurs at runtime.
F.An IllegalStateException occurs at runtime. -
单项选择题
Given： What is the result？（）
A.Compilation fails.
B.pi is bigger than 3.
C.An exception occurs at runtime.
D.pi is bigger than 3. Have a nice day.
E.pi is not bigger than 3. Have a nice day.
