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Initializing Arrays

Mitch Krah
Ranch Hand

Joined: Sep 06, 2004
Posts: 41
I have the following code:

package module6;

class ErrorInfo {
String msgs[] = {
"Output Error",
"Input Error",
"Disk Error",
"Index Out-Of-Bounds"
};

int howBad[] = new int[3];

for(int i = 0; i < howBad.length; i++)
howBad[i] = i * 2;

Err getErrorInfo(int i) {
if(i >= 0 & i < msgs.length)
return new Err(msgs[i], howBad[i]);
else
return new Err("Invalid Error Code", 0);
}
}

However, the compiler will not recognize the "for" loop that I have used to intialize my "howBad" array. I get "illegal start of type" error. Can someone shed some light on this error? I do not get it? The "for" loop is pretty fundamental and I have been using it for months. Is there some requirement that it has to be inside a methog or something? Your assistance is appreciated.
Mike Gershman
Ranch Hand

Joined: Mar 13, 2004
Posts: 1272
You need to put that for loop inside an initializer block like this:


Executable code must be inside a method, a constructor, or an initializer.
[ December 04, 2004: Message edited by: Mike Gershman ]

Mike Gershman
SCJP 1.4, SCWCD in process
Raj Chila
Ranch Hand

Joined: Mar 18, 2004
Posts: 128

note that your for loop must be with in some method block. you can only "declare" some memebers and initializers at class level.
Mitch Krah
Ranch Hand

Joined: Sep 06, 2004
Posts: 41
OK. So help me out here?

In order to initialize an array (other than declaring values), I need to create a method, which I can then use a "for" loop to intialize. Then to get access to the array outside the class, I need to instantiate an object of the class, call the method (using the dot operator). And, then to get a specific value of the array I need to call the array with a specific index #. Because, the array values are only valid withing the method.

So to get a specific value of the Array:

ArrayClass ob = new ArrayClass();
int = ob.arrayMethod(array[2]);

Is this correct?
Mike Gershman
Ranch Hand

Joined: Mar 13, 2004
Posts: 1272
You don't need a method, just an initializer block.

It will be executed before the constructors.
 
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