Given:
Which statement is true?()
A.Compilation fails because the hashCode method is not overridden.
B.A HashSet could contain multiple Person objects with the same name.
C.All Person objects will have the same hash code because the hashCode method is not overridden.
D.If a HashSet contains more than one Person object with name="Fred", then removing another Person,also with name="Fred", will remove them all.
您可能感兴趣的试卷
你可能感兴趣的试题
A.new Thread() {public void run() { doStuff(); }};
B.new Thread() {public void start() { doStuff(); }};
C.new Thread() {public void start() { doStuff(); }}.run();
D.new Thread() {public void run() { doStuff(); }}.start();
E.new Thread(new Runnable() {public void run() { doStuff(); }}).start();
Click the Exhibit button.
What is the result?()
A.The code will deadlock.
B.The code may run with no output.
C.An exception is thrown at runtime.
D.The code may run with output "0 6".
E.The code may run with output "2 0 6 4".
F.The code may run with output "0 2 4 6".
Given:
Which two statements are true?()
A.The output could be 8-1 7-2 8-2 7-1
B.The output could be 7-1 7-2 8-1 6-1
C.The output could be 8-1 7-1 7-2 8-2
D.The output could be 8-1 8-2 7-1 7-2
Given:
foo and bar are public references available to many other threads. foo refers to a Thread and bar is anObject.
The thread foo is currently executing bar.wait().
From another thread,what provides the most reliable wayto ensure that foo will stop executing wait()?
A.foo.notify();
B.bar.notify();
C.foo.notifyAll();
D.Thread.notify();
E.bar.notifyAll();
Click the Exhibit button.
Which two are possible results?()
A.0, 2, 4, 4, 6, 8, 10, 6
B.0, 2, 4, 6, 8, 10, 2, 4
C.0, 2, 4, 6, 8, 10, 12, 14
D.0, 0, 2, 2, 4, 4, 6, 6, 8, 8, 10, 10, 12, 12, 14, 14
Given:
What is the result?()
A.1 2 3
B.Compilation fails because of an error in line 12.
C.Compilation fails because of an error in line 13.
D.Compilation fails because of an error in line 14.
E.A ClassCastException is thrown at runtime.
Given:
What is the result?()
A.TestA
B.TestB
C.Compilation fails.
D.An exception is thrown at runtime.
Given:
Which code, inserted at line 16, correctly retrieves a local instance of a Point object?()
A.Point p = Line.getPoint();
B.Line.Point p = Line.getPoint();
C.Point p = (new Line()).getPoint();
D.Line.Point p = (new Line()).getPoint();
Given:
What is the result?()
A.Compilation succeeds.
B.Exactly one class does NOT compile.
C.Exactly two classes do NOT compile.
D.Exactly four classes do NOT compile.
E.Exactly three classes do NOT compile.
Given:
Which two methods, inserted individually, correctly complete the Three class?()
A.public void foo() {}
B.public int foo() { return 3; }
C.public Two foo() { return this; }
D.public One foo() { return this; }
E.public Object foo() { return this; }
最新试题
Given:What is the appropriate definition of the hashCode method in class Person?()
Click the Exhibit button.What two must the programmer do to correct the compilation errors?()
Given:What is the result?()
Given:What is the result?()
Given:What is the result?()
Click the Exhibit button.Which statement is true about the set variable on line 12?()
Given:What is the result?()
Given:What are four valid examples of polymorphic method calls?()
Given:What is the result?()
Given:Which command-line invocations will compile?()