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Cannot find symbol

John Paterson
Ranch Hand

Joined: Mar 12, 2012
Posts: 170
Hi Folks,

Some issue I am having with some code I wrote. The code as follow:

I am getting a 'Cannot find symbol' error that says srch can't be found. Why am I getting this error? srch is declared in the constructor already so why this error? Hope someone can advise. Thanks.

Kemal Sokolovic

Joined: Jun 19, 2010
Posts: 825

Please post SSCCE.

It is not enough to declare variables in constructor in order to use them throughout your class. You need to declare them as class fields (outside the constructor), otherwise they just act as local variables for the constructor (or any other block of code).

Edit: Playing around with threads without getting along with scope of variables is a tricky business by my oppinion.

The quieter you are, the more you are able to hear.
John Paterson
Ranch Hand

Joined: Mar 12, 2012
Posts: 170
Hi Kemal Sokolovic ,

Noted. Thanks.

Rajdeep Biswas
Ranch Hand

Joined: Mar 26, 2012
Posts: 187

Hi John,

In java you got different scopes, class level, method level, etc...

So had you declared these variables in class level, you would not have got the error. But here, you have declared them in constructor, so compiler can see them inside that particular constructor only, and not in other you are getting "can not find symbol" error....

Hope that helps.

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