"Convert the variables in Java language."
The boys at Mindprod have an extensive collection of useful programs for IT people and programmers, and Converter is one of them, specializing in converting the variables in Java programming language.
The Java variables, or types of data supported by the Java programming language, can now be easily converted with Converter. So that you have an idea, you can change any of the fixed elements (Boolean, signed Byte, unsigned Byte, Short, Character, Integer, Long, Float, Double and String) into the elements: boolean, signed byte, unsigned byte, short, char, int, long, float or double.
Converter can work as an applet for your browser (you can get it on the author's website) or as a runnable program (which is offered here). It also has the advantage of being free.