Hello World Drools Program

To create a basic Drools program, open Eclipse

Go to File -> New -> Project

Select Drools Project. Give a suitable name for the project. For example : FirstDroolsProgram

The next screen shows to select some files which you want in your first drools project.

Select the first two files. The first file is a .drl file(Drools Rule File) and the second is a java class for loading and executing the HelloWorld rule.

Click on Next -> Finish.

Once you click on Finish, a FirstDroolsProgram project is created in your workspace.

Open the java class and then right click and run as java application. You see the output as below :

We will be explaining the program after the next section where let us first explain the basic terms of Rule Engine.