Could not find or load main class [location]

Question

When I try to open a java file I get an error :

could not find or load main class + location of the file

I'll give an example , let's say I have a file.java in my C:\Program Files\Folder.

When i'll try to open that file it'll say :

Could not find or load main class C:\Program Files\Folder\File.java

I looked all around google and I found things about environmental variables , but I have already set my classpath and path.

MIGHT BE IMPORTANT : I use Jdk 1.8.0_25

Maybe these links will help you stackoverflow.com/questions/18093928/… stackoverflow.com/questions/3005433/… — user2479356
– user2479356, Commented Nov 12, 2014 at 12:52
What does it mean "open java file". What are you exactly dowing? — AlexR
– AlexR, Commented Nov 12, 2014 at 12:52
Are you using the command 'java File.java' from the command prompt? does your File.java have a package declaration? — amedeo avogadro
– amedeo avogadro, Commented Nov 12, 2014 at 12:53
by opening a java file I mean just double clicking a .java file. — Mr Empty
– Mr Empty, Commented Nov 12, 2014 at 13:35

Michael Laffargue · Accepted Answer · 2014-11-12 16:30:13Z

0

.java files are not meant to be launched with java command.

You should compile it first with javac that will produce a .class file then if it's a class with a main method you can use java command.

Since you seem completely lost I would suggest reading at least the java documentation and do a welcome tutorial.

Note that if as you stated in your other question (which should be closed now) that you want to run a game server, just download already compiled classes not the sources.

answered Nov 12, 2014 at 16:30

Michael Laffargue

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