assertion

[Arun Prasath]

why is it not recommended to use assertion in public methods(arguments)?

[Remko Strating]

Because a public method might be called from code which you don't control and the assertions are not guaranteed to run. Because you can enable or disable them. So checking on public arguments should be done in a different way.

You could throw an Exception when an argument isn't valid.

[Arun Prasath]

hi remko,
how do you say that assertions are not gauranteed to run in
public methods?

[Anupam Sinha]

Leave aside the fact that whether they are gauranteed to run or not. Giving an AssertionError for an invalid input to a public method doesn't seem right. As to why Assertions can be off sometime you need this.