Book to refer for detailed information of java packages ,libraries and predefined classes

Question

Hello guys!
I am looking for a resource where i find all the information about java packages ,libraries and predefined classes in a collective way which helps as a reference for java . It will be a great help if you guys help me in this and provide any useful pdf or link to get all this information united .
Thank you

Answer 1

The Java API has everything. For offline reference(or online), use an app called Zeal. It downloads docsets, it has an easy and quick search function.

Answer 2

thank you so much for the help @yassine
it almost solves my problem. But for practising and learning ,i use android phone mostly .can you tell me any reference online or offline that i can access from android

Answer 3

big java early objects by horstman or java reference by oracle ...

Answer 4

I think the only solution would be to read Java official page.