Given:
What is the result?()
A.Compilation fails due to an error in line 23.
B.Compilation fails due to an error in line 29.
C.A ClassCastException occurs in line 29.
D.A ClassCastException occurs in line 31.
E.The value of all four objects prints in natural order.
您可能感兴趣的试卷
你可能感兴趣的试题
Given a pre-generics implementation of a method:
What three changes allow the class to be used with generics and avoid an unchecked warning?()
A.Remove line 14.
B.Replace line 14 with "int i = iter.next();".
C.Replace line 13 with "for (int i : intList) {".
D.Replace line 13 with "for (Iterator iter : intList) {".
E.Replace the method declaration with "sum(List
Given:
Which method will complete this class?()
A.public int compareTo(Object o){/*more code here*/}
B.public int compareTo(Score other){/*more code here*/}
C.public int compare(Score s1,Score s2){/*more code here*/}
D.public int compare(Object o1,Object o2){/*more code here*/}
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.
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.
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.
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.
Click the Exhibit button.
Given:
Which statement is true if a TestException is thrown on line 3 of class B?()
A.Line 33 must be called within a try block.
B.The exception thrown by method 1 in class A is not required to be caught.
C.The method declared on line 31 must be declared to throw a runtime exception.
D.On line 5 of class A,the call to method 2 of class B does not need to be placed in a try catch block.
Given:
If class Donkey is invoked twice, the first time without assertions enabled,and the second time with assertions enabled, what are the results?()
A.no output
B.no outputassert is on
C.assert is on
D.no outputAn AssertionError is thrown.
E.assert is onAn AssertionError is thrown.
Given:
What is the result?()
A.5,6
B.5,5
C.6,5
D.6,6
Given:
Under which three circumstances will the code on line 37 be executed?()
A.The instance gets garbage collected.
B.The code on line 33 throws an exception.
C.The code on line 35 throws an exception.
D.The code on line 31 throws an exception.
E.The code on line 33 executes successfully.
最新试题
Given:What is the result?()
A class games.cards.Poker is correctly defined in the jar file Poker.jar. A user wants to execute the main method of Poker on a UNIX system using the command:java games.cards.Poker What allows the user to do this?()
Given:What is the result?()
Given:What is the result?()
Given a class whose instances, when found in a collection of objects, are sorted by using the compare To method, which two statements are true?()
Given:Which code fragment, inserted at the end of line 12, produces the output p is 420?()
Given:What is the appropriate definition of the hashCode method in class Person?()
Given:Which line of code marks the earliest point that an object referenced by intObj becomes a candidate for garbage collection?()
Given:Which command-line invocations will compile?()
Given:Which two code fragments, inserted independently at line 13, will compile?()