"Could not find the main class: MineAvtaler. Program will exit." - Only when running outside Eclipse

I've made my application in Eclipse. It's fairly simple and contains ~1000 lines total with code. My class MineAvtaler contains my main function.

I run this successfully from Eclipse's "Run" button. However whenever I try to run the code from command line, I get the error message in the title. I've compiled as such: javac MineAvtaler.java Avtaledata.java Avtale.java

And tried to run the application as such:

• java MineAvtaler
• javaw MineAvtaler.java

The latter gives the error message in a message box instead of in the console.

Why won't my program run outside of Eclipse?

I'm using Windows 7 and have JDK installed. This is the stacktrace I get:

C:\Users\Codemonkey1991\Desktop\mineavtaler>java MineAvtaler Avtaledata Avtale
Exception in thread "main" java.lang.NoClassDefFoundError: MineAvtaler (wrong name: mineavtaler/MineAvtaler)
        at java.lang.Cla开发者_运维百科ssLoader.defineClass1(Native Method)
        at java.lang.ClassLoader.defineClassCond(Unknown Source)
        at java.lang.ClassLoader.defineClass(Unknown Source)
        at java.security.SecureClassLoader.defineClass(Unknown Source)
        at java.net.URLClassLoader.defineClass(Unknown Source)
        at java.net.URLClassLoader.access$000(Unknown Source)
        at java.net.URLClassLoader$1.run(Unknown Source)
        at java.security.AccessController.doPrivileged(Native Method)
        at java.net.URLClassLoader.findClass(Unknown Source)
        at java.lang.ClassLoader.loadClass(Unknown Source)
        at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
        at java.lang.ClassLoader.loadClass(Unknown Source)
Could not find the main class: MineAvtaler.  Program will exit.

*Here is the source code: *

• MineAvtaler.java
• Avtaledata.java
• Avtale.java

It's a problem of packages. MineAvtaler is inside a package named mineavtaler (character capitalization is relevant), like stated in the first line of your source. So you probably have a directory called mineavtaler, created for you by Eclipse. This is not the directory you created for the project, is a 'special' directory created by Eclipse in which it put your MineAvtaler.java file.

You don't have to open a terminal here. Instead, open it on the parent directory and run: java mineavtaler.MineAvtaler. This way it should work.

EDIT: run java mineavtaler.MineAvtaler from C:\Users\Codemonkey1991\Desktop\

When calling the "java" command you always have to observe the package structure. See http://download.oracle.com/javase/tutorial/java/package/packages.html for more info.