jar cf Predit.jar *.*

java -jar Predit.jar

jar -xf Predit.jar

java Predit

public class Test
{
    public static void main(String[] args)
    {
        System.out.println("Hello world");
    }
}

Manifest-version: 1.0
Main-Class: Test

javac Test.java
jar cfm test.jar manifest.mf Test.class
java -jar test.jar

Hello world

java -classpath Predit.jar your.package.name.MainClass

Manifest-Version: 1.0
Main-Class: your.programs.MainClass

java -jar Predit.jar -classpath your.package.name.Test