Where to read about I/O streams in Java?

Question

Java

Hello. Please explain or poke your nose, where you can read what is written for beginners about I / O streams in Java? There is some kind of complex hierarchy, it is not entirely clear how it is implemented, why is it necessary and how does it relate to threads in multithreading? Thanks :)

Answer 1

www.periodicooficial.oaxaca.gob.mx/files/2011/05/E...