What is the result？（）
A.test end
B.Compilation fails.
C.test runtime end
D.test exception end
E.A Throwable is thrown by main at runtime.
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What is the result？（）
A.0.0
B.Compilation fails.
C.A ParseException is thrown by the parse method at runtime.
D.A NumberFormatException is thrown by the parse method at runtime.
Which line of code marks the earliest point that an object referenced by intObj becomes a candidate for garbage collection？（）
A.Line 16
B.Line 17
C.Line 18
D.Line 19
E.The object is NOT a candidate for garbage collection.
What is the result？（）
A.harrier
B.shepherd
C.retriever
D.Compilation fails
E.retriever harrier
F.An exception is thrown at runtime
When the doSomething method is called， after which line does the Object created in line 5 become available for garbage collection？（）
A.Line 5
B.Line 6
C.Line 7
D.Line 8
E.Line 9
F.Line 10
What is the result？（）
A.null
B.zero
C.some
D.Compilation fails.
E.An exception is thrown at runtime.
Which two statements are true？（）
A.Foo.beta（） is a valid invocation of beta（）.
B.Foo.alpha（） is a valid invocation of alpha（）.
C.Method beta（） can directly call method alpha（）.
D.Method alpha（） can directly call method beta（）.
What is the result when the programmer attempts to compile the code and run it with the command java Converter 12？（）
A.It is true that j==i.
B.It is false that j==i.
C.An exception is thrown at runtime.
D.Compilation fails because of an error in line 13.
and the command line：
java -Dprop.custom=gobstopper Commander
Which two， placed on line 13， will produce the output gobstopper？（）
A.System.load（"prop.custom"）；
B.System.getenv（"prop.custom"）；
C.System.property（"prop.custom）；
D.System.getProperty（"prop.custom"）；
E.System.getProperties（）.getProperty（"prop.custom"）；
What is the result？（）
A.6
B.7
C.10
D.11
E.Compilation fails.
F.An exception is thrown at runtime.
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（）；
最新试题
What is the result？（）
Which two are possible results？（）
Which three changes should be made to adapt this class to be used safely by multiple threads？（）
Given that Triangle implements Runnable， and：Which two statements， inserted independently at both lines 35 and 41， tend to allow both threads to temporarily pause and allow the other thread to execute？（）
Which statement is true？（）
Given that t1 is a reference to a live thread， which is true？（）
What is the result？（）
What is the result？（）
Given： foo and bar are public references available to many other threads， foo refers to a Thread and bar is an Object. The thread foo is currently executing bar.wait（）. From another thread， what provides the most reliable way to ensure that foo will stop executing wait（）？（）
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？（）