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common problem, but still can't solve...

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common problem, but still can't solve...

 
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  #1
Dec 28th, 2008
As far as I've been able to discern. The "cannot find symbol" compile error is a result of one of 2 mistakes.

1) The class name is spelled incorrectly
2) The class isn't in the same directory as the class trying to instantiate the object or the class isn't in the CLASSPATH variable.

I have a class called Item(already compiled in it's .class file), and it's in the same directory as Storefront.java. Storefront.java instantiates a new Item object, yet when I try to compile Storefront I get a "cannot find symbol error". Here's my bash commands to help illustrate the problem.

Java Syntax (Toggle Plain Text) 
  1. dan@dan-laptop:~/java/com/stonehambey/ecommerce$ ls
  2. Item.class  Item.java  Storefront.java
  3. dan@dan-laptop:~/java/com/stonehambey/ecommerce$ javac Storefront.java
  4. Storefront.java:11: cannot find symbol
  5. symbol  : class Item
  6. location: class com.stonehambey.ecommerce.Storefront
  7. 		Item it = new Item(id, name, price, quant);
  8. 		^
  9. Storefront.java:11: cannot find symbol
  10. symbol  : class Item
  11. location: class com.stonehambey.ecommerce.Storefront
  12. 		Item it = new Item(id, name, price, quant);
  13. 		              ^
  14. 2 errors
  15. dan@dan-laptop:~/java/com/stonehambey/ecommerce$

Obviously I'm missing something about how packages and classpaths work, but I don't know what. Any help would be much appreciated.
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Re: common problem, but still can't solve...

 
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  #2
Dec 28th, 2008
Do you have "package" declaration of your Item class?
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Re: common problem, but still can't solve...

 
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  #3
Dec 28th, 2008
The Item class is in package com.stonehambey.ecommerce
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Re: common problem, but still can't solve...

 
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  #4
Dec 28th, 2008
Not the location of the file, but does the class Item starts with
Java Syntax (Toggle Plain Text) 
  1. package com.stonehambey.ecommerce
???
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Re: common problem, but still can't solve...

 
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  #5
Dec 28th, 2008
Sorry, yes it does
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Re: common problem, but still can't solve...

 
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  #6
Dec 28th, 2008
Ohh, little slower today.
In your class Item, did you declare constructor that will initialize this class variable with 4 provided values? Something like this?
Java Syntax (Toggle Plain Text) 
  1. public Item(int id, String name, double price, int quant){
  2.     itemID = id;
  3.     itemName = name;
  4.     itemPrice = price;
  5.     itemQuant = quant;
  6. }
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Re: common problem, but still can't solve...

 
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  #7
Dec 28th, 2008
I've pasted the file, it might be easier

http://paste.ubuntu.com/94519/
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Re: common problem, but still can't solve...

 
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  #8
Dec 28th, 2008
I see nothing wrong with it. Do you mind to post Storefront.java?
Learn to see in another's calamity the ills which you should avoid.
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Re: common problem, but still can't solve...

 
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  #9
Dec 28th, 2008
sure

http://paste.ubuntu.com/94527/

Although here is something interesting. While I've been posting I've been messing with the files in eclipse. Now eclipse builds as I go and when I navigated to the directory I see a Storefront.class sitting there. Eclipse must've managed to build it somehow. However the JDK javac is still reporting the same error. Strange (although I'm pretty new to Java so maybe I'm missing something...)
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Re: common problem, but still can't solve...

 
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  #10
Dec 28th, 2008
That explain a lot. If you use command line to compile it you need to do it as follows
Java Syntax (Toggle Plain Text) 
  1. javac com/stonehambey/ecommerce/Storefront.java
where both files have to be in respectable locations and you need to run javac from the directory that is parent to your "com" so in your case judging by pasted console output in java directory
Java Syntax (Toggle Plain Text) 
  1. dan@dan-laptop:~/java$ javac /com/stonehambey/ecommerce/Storefront.java
Learn to see in another's calamity the ills which you should avoid.
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LJC - London Java Community, Graduate & Undergraduate Software Development Community, JAVAWUG (Java Web User Group), The London Android Group
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