Java issue compiling code in command line: Package does not exist...but it does

Question

I'm trying to compile my Java code with this command (OS X Yosemite):

javac -cp "../../;./colorCalculator;" Application.java

but I get the following errors (among others that are dependent on this):

Application.java:4: error: package colorCalculator does not exist
import colorCalculator.Model;
                  ^
Application.java:5: error: package colorCalculator does not exist
import colorCalculator.View;
                  ^
Application.java:6: error: package colorCalculator does not exist
import colorCalculator.Controller;

I have added two class paths. 1. The path for a ".jar" that this application is dependent on. 2. The package that Application.java imports from.

The directory structure is as such:

├── colorcalculator
│   ├── Application.java
│   └── colorCalculator
│       ├── Controller.java
│       ├── Model.java
│       └── View.java
└── colorcalculator.zip

I run the command from the colorcalculator directory, because that's where Application.java and the colorCalculator package are. What am I doing wrong?

Lastly, the code for your reference if you would like it. It is from a professor's website though, so I'm pretty sure it's correct: code

Thanks!

Change your ./colorCalculator to just ..

RealSkeptic
– RealSkeptic

2015-08-09 17:53:49 +00:00
Commented Aug 9, 2015 at 17:53 — RealSkeptic
– RealSkeptic, Commented Aug 9, 2015 at 17:53

Jon Skeet · Accepted Answer · 2015-08-09 18:24:49Z

1

The classpath is meant to include the root of the package structure for any appropriate directory. So the compiler is currently looking for ../../colorCalculator/Model.class or ./colorCalculator/colorCalculator/Model.class when you actually just want it to look for ./colorCalculator/Model.class

Additionally, as you're using OS X, you should use : instead of ; as the path separator.

So you should have:

javac -cp ../..:. Application.java

Note that you haven't actually added a path to a jar file at all - if you've got a jar file in ../.. you actually want

javac -cp ../../whatever.jar:. Application.java

edited Aug 9, 2015 at 18:24

answered Aug 9, 2015 at 17:53

Jon Skeet

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8 Comments

newbie Over a year ago

Hmm, I have tried these commands (modified to my classes), but they still don't work. 1. I added the quotation marks around the class paths. 2. I specified the jar itself, but am still getting the same original error message.

Jon Skeet Over a year ago

@newbie: You shouldn't need the quotes - that's why I removed them. The important change was to use just . rather than ./colorModel. What operating system are you using thoguh? If it's Unix you should use : instead of ; as the path separator.

newbie Over a year ago

I'm using OS X Yosemite

Jon Skeet Over a year ago

@newbie: Well that's the other problem then. Will edit my answer.

newbie Over a year ago

Oh, sorry. Should have put that in my original post!

|

Tony the Tech · Accepted Answer · 2015-08-09 17:54:51Z

0

Classpath includes the root of your package hierarchy. So since you name your package colorCalculator, the root of that path is not './colorCalculator', but is actually just '.'.

So try -cp "../../;."

answered Aug 9, 2015 at 17:54

Tony the Tech

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