Java assertions

OK, I need to put assertions into my Java code, but I can't figure out how to enable assertions in my NetBeans 6.8 IDE.

Is this the only step I need to complete in order to be able to use assertions?

Just to set this up, I am creating simple Java code:

class Main
    public static void main(String[] 开发者_JS百科args) throws IOException {
      System.out.print("Enter your marital status: ");
      int c = System.in.read();
      switch ((char) c) {
         case 's':
         case 'S': System.out.println("Single"); break;
         case 'm':
         case 'M': System.out.println("Married"); break;
         case 'd':
         case 'D': System.out.println("Divorced"); break;
         default: assert !true : "Invalid Option"; break;
      }
    }
}

Then I go to Run* → Set project configuration → Customize...

I enter in the "VM Options" box: -enableassertions:javaapplication58

As javaapplication58 is my package

I have used this approach because upon googling a bit, it looks like what you do, but I still can't get my assert to work. Is there a better tutorial?

Add an ellipsis to the VM argument. Instead of:

-enableassertions:javaapplication58

use

-enableassertions:javaapplication58...

There's a pretty good overview of Java assertions here. It describes enabling/disabling assertions for specific classes within a package, and some other tips and tricks to help you along.

You need to use this with three dots to get everything in the package

-enableassertions:javaapplication58...

That will also enable assertions in subpackages unless you explicitly disable them.

From the output of java -h one gets this help:

-ea[:<packagename>...|:<classname>]
-enableassertions[:<packagename>...|:<classname>]
              enable assertions with specified granularity