I'm looking for a relatively simpler (when compared with writing a parser) way to evaluate boolean expressions in Java, and I do not want to use the JEP library.
I have a String expression like: (x > 4 || x < 8 && p > 6) and my aim is to replace the variables with values.
Is there a way by which I can evaluate this expression?
Bear in mind that this can be any level deep so writing a parser would be very complex.
You could use the scripting engine in Java6 and the choose any of the popular scripting languages like Scala, Ruby, Python, Groovy, and Javascript. Than all you have to do is make sure the expression you want to evaluate is in the right language. Groovy is probably the easiest and will integrate best.
I have used this method successfully for a feature offering capabilities much like a formula / calculated column in a popular spreadsheet application.