A practical way to learn to work with threads

[Nooshin Z]

Hi,

It's about a year that I have been coding on Java but I still have basic problems working with threads. My main concern is that I can't understand the logic they obey in their behaviour. I know that they are processes which run independently but I don't know how to join their results or make them communicate with each other. I also have difficulties working with threads with different priorities mainly related to input-output procedures which never seem to run synchronised with other parts of code. Also taking use of synchronised blocks, does not always lead to a result in which the code inside the block is not interrupted by any other procedure. I'm not convenient with where I should use wait, sleep, join.... It seems like even using these tricks does not work when I want to interrupt a higher priority thread with a lower one. I will be thankful if you could guide me!

[mKorbel]

please read/check/write code, then ask specific question(s), your descriptions fully covered these links:

http://download.oracle.com/javase/tutorial/essential/concurrency/index.html
http://www.java2s.com/Code/Java/Threads/CatalogThreads.htm

or

write plain vanilla Thread and ask for that (by your above mentioned describtions) but step by step

[Nooshin Z]

Thank you. Both of links were really useful.
I also wanted to know your idea about if dealing with high level concurrency objects is going to be useful for me before getting convenient with working with threads at this level. Will I achieve better results if I develop my knowledge about all types of concurrency objects together or not?