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Java calculator for MIDP or J2ME devices

March 5th, 2010 | Add a Comment

Calc is a Java calculator for MIDP or J2ME devices, such as a Java-enabled mobile phone or PDA. It was developed on a Sony Ericsson T610, which was my first Java-enabled phone but which has such a pitiful built-in calculator that I was compelled to develop this application. Calc works much like a good old HP calculator with RPN logic, but the stack has 16 elements and you can see many of the elements on the stack simultaneously. I have chosen to use RPN logic (Reverse Polish Notation), because operating it requires less keys, you need only ENTER instead of “(”, “)” and “=”. Additionally, being able to store and see intermediate results on the stack is very advantageous. Using the Real Java floating point library, Calc has 63 bits internal precision, … Read entire article »

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