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question about mock test

VuTuan Tran
Greenhorn

Joined: Oct 21, 2010
Posts: 14
This question is taken from SCJP 6 study guide
1.class Fork {
2.public static void main(String[] args) {
3.if(args.length == 1 | args[1].equals("test")) {
4.System.out.println("test case");
5.} else {
6.System.out.println("production " + args[0]);
7.}
8.}
9.}
And the command-line invocation:
java Fork live2
Question : what is the result

I dont understand why the answer is
E. An exception is thrown at runtime

My logic is :at line 3 we are going to have
It is equivalent to
I know my logic is wrong but I cant figure it out. Please help me to make it clear.Thanks
Christophe Verré
Sheriff

Joined: Nov 24, 2005
Posts: 14687
    
  16

There's only one parameter : live2. So only args[0] is valid.


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VuTuan Tran
Greenhorn

Joined: Oct 21, 2010
Posts: 14
Christophe Verré wrote:There's only one parameter : live2. So only args[0] is valid.

Ahhhhhhh, it is my bad. Thanks for pointing out.
Campbell Ritchie
Sheriff

Joined: Oct 13, 2005
Posts: 38784
    
  23
Please always tell us what the thread is about; "question about mock test" is too vague.
 
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