Developed in 1983 for jazz and popular music. A thicker tip and a more flexible palette* than the Traditional reed allow vibration over a larger surface area with maximum elasticity.

This type of vertebral column gives the musician much greater playing flexibility, as the resultant elasticity zone is very large.
JAVA reeds are more flexible than Traditionals and V16s and vibrate on a long palette, creating a bright sound with immediate response.

Vandoren Reed Technical Details and Strength Chart: 

*Palette: zone where the waves are propagated with the greatest range. From the tip, the waves are absorbed further in the JAVA reed.