Java Api

 

 

    public static int CalculateResult(String InStr) {
        ScriptEngineManager manager = new ScriptEngineManager();
        ScriptEngine engine = manager.getEngineByName("js");

        try {
            return (int) engine.eval(InStr);
        } catch (ScriptException e) {
            e.printStackTrace();
        }

        return 0;
    }