Simple library for calculator in java (Android)

Question

Is there any simple library in java which can parse a string as input and produce result after evaluating the input string. Such as- I will give a String like 5+5*(4/2)-7+1 and any of the library method will return me the output: 9.

[duplicate](http://stackoverflow.com/q/15173681/1113392) . see [this answer](http://stackoverflow.com/a/15174060/1113392) — A4L, Jul 03 '14 at 10:25
possible duplicate of [Evaluating a math expression given in string form](http://stackoverflow.com/questions/3422673/evaluating-a-math-expression-given-in-string-form) — Akhilesh Dhar Dubey, Jul 03 '14 at 10:25
Please try to perform at-least one google search before asking. — Atish Kumar Dipongkor, Jul 07 '14 at 05:53

score 2 · Accepted Answer · answered Jul 03 '14 at 10:32

Java provides a built-in JavaScript syntax processing:

javax.script.ScriptEngineManager mgr = new javax.script.ScriptEngineManager();
javax.script.ScriptEngine engine = mgr.getEngineByName("JavaScript");
String res = "5+5*(4/2)-7+1";
System.out.println(engine.eval(res));

Simple library for calculator in java (Android)

1 Answers1