Error upon execution of JDK 8 java class file: "Error: Could not find or load main class in TicTacToeRandom"

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I've been trying all sorts of stuff for quite some time now. I'm trying to run java applications from the terminal in Linux Mint. I think it may be related to two different java installations.

I began doing tutorials with JDK 7 and an old Eclipse build, but had to upgrade both to JDK 8 and Eclipse 4.4.4 for javafx, and in the process I went from using a folder called Java to a folder called Java2. Everything in the Java folder will run from the terminal, but nothing in the Java2 folder will.

The error boils down to this:

This works:

dalsgaard@dalsgaard $ pwd
/home/dalsgaard/Skrivebord/Java/tutorials/bin
dalsgaard@dalsgaard $ java Welcome
Hej med dig!

This does not:

dalsgaard@dalsgaard $ pwd
/home/dalsgaard/Skrivebord/Java2/tutorials/bin/application
dalsgaard@dalsgaard $ java helloWorld 
Error: Could not find or load main class helloWorld

As you can see, I have a main class:

package application;

public class helloWorld {

    public static void main(String[] args) {
        System.out.println("Hello StackOverflow!");

    }

}

I have tried the following:

dalsgaard@dalsgaard $ javapackager -createjar -appclass Application.TicTacToeRandom -outdir . -outfile outjar -srcdir . -v
dalsgaard@dalsgaard $ java -jar outjar.jar
Error: Could not find or load main class Application.TicTacToeRandom
dalsgaard@dalsgaard $ 

It compiles no problem, and javapackager finds all the right files! I still think it may be related to classpath issue and workspaces, though it doesn't make any sense to me. Since all I get when I echo $CLASSPATH is a blank line, I have tried to specify the path directly, but that doesn't work either:

dalsgaard@dalsgaard $ java -cp /home/dalsgaard/Skrivebord/Java2/ helloWorld
Error: Could not find or load main class helloWorld

Also, why would it give a "no main class" error, if classpath was the problem? In any case, I've tried compiling and running directly within the workspace folder too:

dalsgaard@dalsgaard $ pwd
/home/dalsgaard/Skrivebord/Java2/TicTacToeRandom
dalsgaard@dalsgaard $ java TicTacToeRandom 
Error: Could not find or load main class TicTacToeRandom

That doesn't work either. Java version, linux version, etc:

dalsgaard@dalsgaard $ java -version
java version "1.8.0_25"
Java(TM) SE Runtime Environment (build 1.8.0_25-b17)
Java HotSpot(TM) 64-Bit Server VM (build 25.25-b02, mixed mode)
dalsgaard@dalsgaard $ uname -a
Linux dalsgaard 3.13.0-24-generic #47-Ubuntu SMP Fri May 2 23:30:00 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux

asked 1 min ago

Martin

1

Error upon execution of JDK 8 java class file: "Error: Could not find or load main class in TicTacToeRandom"