Boolean Expression Evaluation in Java

Question

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

Answer 1

You could try this library https://github.com/Shy-Ta/expression-evaluator-demo - the read me has a fair number of examples. The library uses java and groovy.

In addition to supporting this use case, it also supports a lot of other excel like functions. Also, it is very simple to add new functions as demonstrated in the example.

      ExpressionsEvaluator evalExpr = ExpressionsFactory.create("(x > 4 || x < 8 && p > 6)");  
      Map variables = new HashMap();  
      variables.put("x", 100);  
      variables.put("p", 10);
      evalExpr.eval();