Is it possible to divide 2 variables in .properties file

Question

How to divide two different variables in JAVA .properties file

When I do like this:

amount = 10
cur = 5
sum=${amount}/${cur} 

I get sum as a String:

10/5

Answer 1

You could do that in few ways:

after receiving an value from the properties file, you can evaluate it in for example built in javascript engine since java 1.6:

import javax.script.ScriptEngineManager;
import javax.script.ScriptEngine;

public class ScriptEngineTest {
  public static void main(String[] args) throws Exception{
    ScriptEngineManager mgr = new ScriptEngineManager();
    ScriptEngine engine = mgr.getEngineByName("JavaScript");
    String value = "10/5";
    System.out.println(engine.eval(value));
    } 
}

or you can write your own evaluator/ use different library.

You can even extend an ResourceBundle, and override the get method to eval each value before you get it if that is desired.