Jeet Kune Do is not a style onto itself. Rather, it is the system of philosophy and concepts developed by Si-Gung Bruce Lee and continued by Sifu Dan Inosanto. JKD training provides a means of self-discovery for training of martial arts. The main concept is to “absorb what is useful, to reject what is useless and to add what is specifically your own.” In using this philosophy, the student learns to identify what works best for him/her in encountering today's modern threats. The idea is to be functional in four ranges (Kicking, Punching, Trapping and Grappling), against armed or unarmed opponents, versus multiple opponents and in any environment. No one art can provide all the answers or solutions to effective self-defense. A process of cross training, researching and developing ourselves with different disciplines of the most effective martial arts in the world is used to overcome the limitations of any single art. Cross training enables us to fill in the gaps and weaknesses that we might have. This is the object of JKD; to be bound by no style and in combat to use no style as style, to use no way as way, to use no system as system, to have no limitation as your limit in achieving your goal. The principles of JKD can be applied to any interest or vocation in life.
Jeet Kune Do, broken down in each range:
1)Kicking & Punching Range: Jun Fan Kickboxing, Muay Thai, Savate, Western Boxing, Filipino Boxing (Panantuken)
2)Trapping Range: Wing Chun, Jun Fan Trapping, Kali-Silat.
3)Grappling Range: Brazilian Jiu-Jitsu, Shoot wrestling, Jun Fan Grappling
4)Weaponry: Filipino Kali (Stick Fighting, Double Sticks, Knife Fighting, Staff)
JKD allows an individual to train in multiple ranges from kicking to punching to trapping to grappling and learn how to transition from one range to the next. There is no set curriculum for JKD, but rather the individual develops it.
Jun Fan or Lee Jun Fan is the Chinese name of Bruce Lee. The Jun Fan Martial Arts are the training methods originally developed by Si-Gung Bruce Lee in the 1960's during his exploration of the principles and theories of JKD. It is a core foundation that can help you to discover the concepts of Jeet Kune Do. The Jun Fan Martial Arts are a blend of modified Wing Chun Gung Fu, Western Boxing, Fencing, several Northern & Southern Chinese Gung Fu styles and various grappling disciplines. The Jun Fan Martial Arts can be broken down into two main areas: Jun Fan Kickboxing and Jun Fan Trapping (within the trapping/in-fighting program will be elements of Grappling and Ground-fighting). Most styles favor one or two ranges, Jun Fan incorporates all four ranges (Kicking, Punching, Trapping and Grappling). As a set curriculum, Jun Fan may be limited to specific techniques and training, while Jeet Kune Do has no such limitation. While Jun Fan is one tool that can be used to train the principles and concepts of JKD, it is not the only one.
Programs 
Jeet Kune Do is not a style onto itself. Rather, it is the system of philosophy and concepts developed by Si-Gung Bruce Lee and continued by Sifu Dan Inosanto. JKD training provides a means of self-discovery for training of martial arts. The main concept is to “absorb what is useful, to reject what is useless and to add what is specifically your own.” In using this philosophy, the student learns to identify what works best for him/her in encountering today's modern threats. The idea is to be functional in four ranges (Kicking, Punching, Trapping and Grappling), against armed or unarmed opponents, versus multiple opponents and in any environment. No one art can provide all the answers or solutions to effective self-defense. A process of cross training, researching and developing ourselves with different disciplines of the most effective martial arts in the world is used to overcome the limitations of any single art. Cross training enables us to fill in the gaps and weaknesses that we might have. This is the object of JKD; to be bound by no style and in combat to use no style as style, to use no way as way, to use no system as system, to have no limitation as your limit in achieving your goal. The principles of JKD can be applied to any interest or vocation in life. 
