Shorter solution to if,else if,else if

Question

I\'m looking for a way to shorten this code up and avoid repeating code and if statements. What I\'m doing is creating a calculator that searches strings for operators &quo

Answer 1

Here's a snippet:

public static void main(String[] args) {

        float primeResult;
        String exp = "4-2";
        int i = 1;
        ScriptEngineManager mgr = new ScriptEngineManager();
        ScriptEngine engine = mgr.getEngineByName("JavaScript");

        char[] myVar = new char[] { '*', '/', '-', '+' };

        for (int myVarCtr = 0; myVarCtr < myVar.length; myVarCtr++) {

            if (exp.charAt(i) == myVar[myVarCtr]) {

                try {
                    primeResult = Float.parseFloat(engine.eval(
                            (Integer.parseInt(exp.substring(0, i)))
                                    + Character.toString(myVar[myVarCtr])
                                    + (Integer.parseInt(exp.substring(i + 1,
                                            exp.length())))).toString());
                    System.out.println(primeResult);
                } catch (ScriptException e) {
                    e.printStackTrace();
                }

            }

        }
    }