How to Install Java Darcula look and feel?

I want to install the Darcula look and feel so I can change the appearece of my Java projects.

I executed this code to know which look and feels I have installed:

for (javax.swing.UIManager.LookAndFeelInfo info : javax.swing.UIManager.getInstalledLookAndFeels()) {
        System.out.println("Look: " + info.getName());
    }

The console shows that I don't have Darcula. Only these ones:

Look: Metal
Look: Nimbus
Look: CDE/Motif
Look: GTK+

I downloaded this https://github.com/bulenkov/Darcula and I added to my project as a library. But I am not sure if it is the right approach.

I use Netbeans 8.2.