Assertions - command line switches

[John Stark]

I don't really understand what the ':' is for in the command line switches for using assertions.
What is the ':' in 'java -ea:com.Bar' for?

When is it 'java -ea com.bar' ?

Can anybody explain?

Thanks,

John

[Stephan van Hulst]

You can either use the switch with or without arguments. If you use arguments, you always need to use a colon.

Using the switch without arguments means that you enable assertions for all classes, except for system classes. If you arguments, there are two forms:

-ea:com.example...
-ea:com.example.Klass

The first one will enable assertions for class Klass.
The second one will enable assertions for all classes in com.example, and recursively enable assertions for all sub-packages.

"java -ea com.Bar" means run the class Bar with all assertions enabled (except system classes).

"java -ea:com.Bar" means nothing, because you didn't supply a class to run.

[Joanne Neal]

Stephan van Hulst wrote:-ea:com.example...
-ea:com.example.Klass

The first one will enable assertions for class Klass.
The second one will enable assertions for all classes in com.example, and recursively enable assertions for all sub-packages.

Have you got that the right way round ?

[John Stark]

Thanks Stephan, it is clear now.

John

[Stephan van Hulst]

Joanne Neal wrote:

Stephan van Hulst wrote:-ea:com.example...
-ea:com.example.Klass

The first one will enable assertions for class Klass.
The second one will enable assertions for all classes in com.example, and recursively enable assertions for all sub-packages.

Have you got that the right way round ?

Errr.... woops

[naveen yadav]

Stephan van Hulst wrotes :

-ea:com.example...
-ea:com.example.Klass

The first one will enable assertions for class Klass.
The second one will enable assertions for all classes in com.example, and recursively enable assertions for all sub-packages.

first one is will enable assertion in com.example for all classes .But not for sub-packages Right ??

Second is will enable assertion for class Klass only . Right??

[Stephan van Hulst]

Yes Naveen, that's what Joanne pointed out.