Java String convertion into Integer

Question

I have a string like str= "25+25" .What I want is convert into Integer this string so that real operation will happen to give the final result of 50

Answer 1

https://stackoverflow.com/questions/2605032/is-there-an-eval-function-in-java

ScriptEngineManager manager = new ScriptEngineManager();
ScriptEngine engine = manager.getEngineByName("js");
Object result = engine.eval("25+25");

Maybe this will help? I think this runs JS code inside a Java program