debugging in eclipse

[Alireza Eskandari]

Hi friends,
I'm not a Java developer but I'm interested to do some discoveries in 
CloudStack code.
I have created a development environment with Eclipse in Ubuntu and I can 
successfully compile and run CloudStack 4.5.2 in this environment.
The question is how can I use Eclipse to debug and trace the code and variables 
values while CloudStack is running. How can I use breakpoints and etc.
Regards,
Alireza