Java Shell - an easy and quick way to run java code.
In Java Shell is based on the JSR 274 specification of java and its concrete realization BeanShell.
BeanShell - scripting language for Java. Language supported Java Runtime Environment, and uses Java syntax.
You can perform almost any code directly on your Android device.
If there is a need to implement some kind of idea as part of the program I'm ready to implement it.