Given a correctly compiled class whose source code is：
Assume that the class file is located in /foo/com/sun/sjcp/， the current directory is /foo/， and that theclasspath contains "." （current directory）.
Which command line correctly runs Commander？（）
A.java Commander
B.java com.sun.sjcp.Commander
C.java com/sun/sjcp/Commander
D.java -cp com.sun.sjcp Commander
E.java -cp com/sun/sjcp Commander
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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？（）
A.put Poker.jar in directory /stuff/java， and set the CLASSPATH to include /stuff/java
B.put Poker.jar in directory /stuff/java， and set the CLASSPATH to include /stuff/java/*.jar
C.put Poker.jar in directory /stuff/java， and set the CLASSPATH to include /stuff/java/Poker.jar
D.put Poker.jar in directory /stuff/java/games/cards， and set the CLASSPATH to include /stuff/java
Given：
What is the result？（）
A.s 14
B.s 16
C.s 10
D.Compilation fails.
Given：
What is the result？（）
A.Compilation fails.
B.An exception is thrown at runtime.
C.doStuff x = 6 main x = 6
D.doStuff x = 6 main x = 7
E.doStuff x = 7 main x = 6
Given：
What is the result？（）
A.1
B.2
C.12
D.Compilation fails.
E.No output is produced.
F.An exception is thrown at runtime.
Given：
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
Click the Exhibit button.
Which graph represents the correct directory structure for a JAR file from which those classes can be used by the compiler and JVM？（）
A.Jar A
B.Jar B
C.Jar C
D.Jar D
E.Jar E
Given：
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
Given：
What is the result？（）
A.Exception
B.A NullPointerException is thrown at runtime.
C.Compilation fails because of an error in line 20.
D.Compilation fails because of an error in line 14.
Given：
What is the result？（）
A.null
B.zero
C.some
D.Compilation fails.
E.An exception is thrown at runtime.
Given：
What is the result？（）
A.2
B.24
C.234
D.246
E.2346
最新试题
Given：When the doSomething method is called， after which line does the Object created in line 5 become available for garbage collection？（）
Given：What is the result？（）
Given：Which two code fragments， inserted independently at line 5， will compile without warnings？（）
Given：Which code fragment， inserted at the end of line 12， produces the output p is 420？（）
Given：What is the result？（）
Click the Exhibit buttonWhich two statements are true if a NullPointerException is thrown on line 3 of class C？（）
Given：What is the result？（）
Given：What are four valid examples of polymorphic method calls？（）
Given：Which command-line invocations will compile？（）
Click the Exhibit button.Which graph represents the correct directory structure for a JAR file from which those classes can be used by the compiler and JVM？（）