How do I run my program through Command Line?

I'm trying to get my program to run through Command Line or DOS(same thing). I also wanted to create a shortcut that would always run it. I could copy the shortcut w/ the source code or JAR file and run it somewhere else just by clicking the shortcut.

call the class that contains the main() method. do execute this class from the command line use

java ClassName

without its extension.

error message:

Exception in thread "main" java.lang.NoClassDefFoundError: DifA
Caused by: java.lang.ClassNotFoundException: DifAnalysis
at java.net.URLClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native M
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.misc.Launcher$AppClassLoader.loadClass(Unknown S
at java.lang.ClassLoader.loadClass(Unknown Source)
Could not find the main class: DifAnalysis. Program will exit.

You have to compile the class that contains the main method.

javac MyClass.java

Then you run the class

java MyClass

You have to make sure that your environment variable is set up correctly also. If you're on Linux your terminal should have it set up by default already.
If you are on Windows, it should be something like:
Control Panel -> System -> Properties -> Environment Variables

Then your java path should be the java root directory. something like
c://program files/java_version

Then add Java Path to your path variable: %Java Path%/bin

The directions for the path set up are not 100% correct, but if this is your problem just let me know