This week's book giveaway is in the OCAJP 8 forum. We're giving away four copies of OCA Java SE 8 Programmer I Study Guide and have Edward Finegan & Robert Liguori on-line! See this thread for details.
I create a class to test multi-threading book.when work in 50 , 100 threads it's ok. but when I set thread number 1500.some connection requests will be refused.what's the matter with it? any answer is appreciated!!!