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Dan's exam: main method

 
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I have a problem with this question:

What is the result of attempting to compile and run the above programs?
a. Compile-time error at line 1.
b. Compile-time error at line 2.
c. Compile-time error at line 3.
d. An attempt to run GRC4 from the command line fails.
e. An attempt to run GRC5 from the command line fails.
f. An attempt to run GRC6 from the command line fails.
g. None of the above
The code WILL compile without problem but can't be executed unless the file name is GRC4, GRC5 or GRC6 - none of the classes is declared public so the main method can't be found. Even so, only one of the classes can be executed never all three (provided they're in the same file).
In my opinion, rephrasing needs to be done otherwise the correct answers should be D,E,F.
 
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The class is not visible to other classes in different packages, not to JVM, so why wouldn't it see it when you run it through command-line?
The answer is
g. None of the above
because it compiles and any of the 3 following command line invocations run fine:
java GRC4
java GRC5
java GRC6
P.S. Oh yeah, when you compile a java source file with n N classes in it, you will get N .class files and you can invoke them through command-line. In this example you'll get GRC4.class GRC5.class and GRC6.class (no matter what the .java filename is)
[ March 15, 2004: Message edited by: Yuriy Grechukhin ]
 
Bojan Knezovic
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Originally posted by Yuriy Grechukhin:

P.S. Oh yeah, when you compile a java source file with n N classes in it, you will get N .class files and you can invoke them through command-line. In this example you'll get GRC4.class GRC5.class and GRC6.class (no matter what the .java filename is)



Hmmm... must admit I didn't know that. Thanks!
 
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Bojan,
every class creates a .class file, even inner classes.
Davy
 
Don't get me started about those stupid light bulbs.
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