Given：
Which two statements are true about the result if the default locale is Locale.US？（）
A.The value of b is 2.
B.The value of a is 3.14.
C.The value of b is 2.00.
D.The value of a is 3.141.
E.The value of a is 3.1415.
F.The value of a is 3.1416.
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Given that the current directory is empty， and that the user has read and write privileges to the currentdirectory， and the following：
Which statement is true？（）
A.Compilation fails.
B.Nothing is added to the file system.
C.Only a new file is created on the file system.
D.Only a new directory is created on the file system.
E.Both a new file and a new directory are created on the file system.
Given：
Which statement is true？（）
A.Compilation fails.
B.An exception is thrown at runtime.
C.Synchronizing the run（） method would make the class thread-safe.
D.The data in variable "x" are protected from concurrent access problems.
E.Declaring the doThings（） method as static would make the class thread-safe.
Given
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（）.
Given：
And MainClass exists in the /apps/com/company/application directory.
Assume the CLASSPATH environment variable is set to "." （current directory）.
Which two java commands entered at the command line will run MainClass？（）
A.java MainClass if run from the /apps directory
B.java com.company.application.MainClass if run from the /apps directory
C.java -classpath /apps com.company.application.MainClass if run from any directory
D.java -classpath . MainClass if run from the /apps/com/company/application directory
E.java -classpath /apps/com/company/application：. MainClass if run from the /apps directory
Given：
What is the result？（）
A.w-f
B.f-p w-f
C.w-f b-f
D.f-p w-f b-f
Click the Exhibit button.
What is the output of the program shown in the exhibit？（）
A.300-100-100-100-100
B.300-300-100-100-100
C.300-300-300-100-100
D.300-300-300-300-100
Given：
What is the result？（）
A.No output is produced. 1 2 3
B.No output is produced. 2 3 4
C.No output is produced. 1 2 3 4
D.An exception is thrown at runtime. 1 2 3
A developer is creating a class Book， that needs to access class Paper. The Paper class is deployed in a JAR named myLib.jar.
Which three， taken independently， will allow the developer to use the Paper class while compiling the Bookclass？（）
A.The JAR file is located at $JAVA_HOME/jre/classes/myLib.jar.
B.The JAR file is located at $JAVA_HOME/jre/lib/ext/myLib.jar..
C.The JAR file is located at /foo/myLib.jar and a classpath environment variable is set that includes /foo/myLib.jar/Paper.class.
D.The JAR file is located at /foo/myLib.jar and a classpath environment variable is set that includes /foo/myLib.jar.
E.The JAR file is located at /foo/myLib.jar and the Book class is compiled using javac - cp /foo/myLib.jar/Paper Book.java.
F.The JAR file is located at /foo/myLib.jar and the Book class is compiled using javac - classpath /foo/myLib.jar Book.java
Given：
What is the result？（）
A.Compilation fails.
B.An exception is thrown at runtime.
C.The attribute id in the ItemTest object remains unchanged.
D.The attribute id in the ItemTest object is modified to the new value.
E.A new ItemTest object is created with the preferred value in the id attribute.
Given：
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"）；
最新试题
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？（）
Given：Which two code fragments， inserted independently at line 13， will compile？（）
Given：What is the result？（）
A team of programmers is involved in reviewing a proposed design for a new utility class. After some discussion， they realize that the current design allows other classes to access methods in the utility class that should be accessible only to methods within the utility class itself.What design issue has the team discovered？（）
Given：What is the result？（）
Given：Which command-line invocations will compile？（）
Given：What is the result？（）
Given：What is the result？（）
Given：What is the result？（）
Given：When the doSomething method is called， after which line does the Object created in line 5 become available for garbage collection？（）