AS Java logs

Hi All,

I have few question on AS Java logs.

- how many type of log files can be generated and what are they? (e.g - security audit log, security log, system log, etc)

- whether logs are activated by default? how to activate the log?

- how to extract logs? whether I can use ABAP itself or any other way to extract?

Thank you.

With Regards,

Gandhi Subramani