Java Scripting APIはJavaの標準APIとして提供されているものなので、JavaScriptエンジンが変わったとしても、まったく同じように使用できるという利点 ...

Scripting initiative would capitalize on languages widely used in Web applications and considered easier to use than Java.

However, scripting languages fall short if they are used to build large-scale or mission-critical applications, due to potential scalability and performance issues.

Sun releases Java Standard Edition 6, a Java desktop update meant to work better with scripting languages.