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Fat Jar Eclipse Plug-In Tutorial

Create a new Java Project named "demolib".
Add the Class "demolib.DemoLib.java" containing the following code:

package demolib;            public class DemoLib {            public static void sayHello() {            System.out.println("Hello");            }            }            

In the "Package-Explorer" (not the "Resource-View") right click on the project "demolib".
Select "+ Build Fat Jar".

A Configuration Dialog appears. Just press "Finish".

The File "demolib_fat.jar" has been created in the project root directory.

Create a new Java Project named "demorun".
In the project properties add the Library "demolib/demolib_fat.jar" to the Java Build Path":

Add the Class "demorun.DemoRunMain.java" containing the following code:

package demorun;            import demolib.DemoLib;            public class DemoRunMain {            public static void main(String[] args) {            DemoLib.sayHello();            }            }            

Start the Export Wizard from the File-Menu ("File" -> "Export").
Select "+ Fat Jar Exporter" and click "next >".

Select the project "demorun" and click "next >".

A Configuration-Dialog appears showing the current Settings.

The Main Class - the one containing the static methode main - must be defined in the jar.
Click on the "Browse..." Button on the right side behind the Main-Class Edit field.

Select "DemoRunMain" and click the "OK" Button.
The FullyQualifiedName "demorun.DemoRunMain" is now set for "Main-Class".

Save the current Settings by clicking on the "Finish" Button.

The File "demorun_fat.jar" has been created in the project root directory.
In addition the file ".fatjar" storing the configuration settings has been created in the project root directory

The created jar file contains all classes from all referenced jar files (demolib_fat.jar) and the project classes.
This file can be executed anywhere, no classpath has to be set, because all necessary libraries
are extracted inside the "Fat Jar":

> java -jar demorun_fat.jar            Hello            

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