synth is a skinnable Java look and feel, which is configured with an XML property file. According to Sun, goals for synth were: * Enable to create custom look without writing any code. * Allow appearance to be configured from images. * Provide the ability to customize the look of a component based on its named properties. * Provide a centralized point for overriding the look of all components. * Enable custom rendering based on images, or user-defined <a rel="nofollow" class="external text" href="//docs.oracle.com/javase/8/docs/api/javax/swing/plaf/synth/SynthPainter.html">SynthPainter</a>s.