单项选择题

package com.sun.sjcp；
public class Commander{
public static void main（String[]args）{
//more code here
}
}
Assume that the class fileis located in /foo/com/sun/sjcp/，the current directory is/foo/，and that the classpath contains“.“（current directory）.
Which command line correctly runs Commander？（）

A.java Commander
B.java com.sim.sjcp.Commander
C.java com/sun/sjcp/Commander
D.java-cpcom.sun.sjcp Commander
E.java-cpcom/sun/sjcp Commander

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单项选择题

public classYippee{
public static void main（String[]args）{
for（intx=1；xSystem.out.print（args[x]+""）；
}
}
}
and two separate command line invocations：j
avaYippee
javaYippee1234
What is the result？（）

A.No output is produced.       123
B.No output is produced.        234
C.No output is produced.       1234
D.An exception is thrown at runtime.        123
E.An exception is thrown at runtime.         234
F.An exception is thrown at runtime.        1234

多项选择题

Which two are true？（）

A.A finalizer may NOT be invoked explicitly.
B.The finalize method declared in class Object takes no action.
C.super.finalize（）is called implicitly by any over riding finalize method.
D.The finalize method for a given objec twill be called no more than once by the garbage collector.
E.The order in which finalize will be called on two objects is based on the order in which the two objects became finalizable.

单项选择题

11.public void genNumbers（）{
12.ArrayList numbers=new ArrayList（）；
13.for（inti=0；i<10；i++）{
14.intvalue=i*（（int）Math.random（））；
15.IntegerintObj=newInteger（value）；
16.numbers.add（intObj）；
17.}
18.System.out.println（numbers）；
19.}
Which line of code marks the earliest point that an object referenced by intObj becomes a candidate for garbagec ollection？（）

A.Line16
B.Line17
C.Line18
D.Line19
E.The object is NOT a candidate for garbage collection.