synchronized thread execution

Question

my task is to create thread in this order: if A start->start B and C, if B start->start D. And destroy them in reverse order If D then B. If B and C then A. I hope you get it.

Answer 1

In multi threading, there is no need of synchronization unless the common data is shared by multiple threads. In your case, you want to start and stop the threads in a particular order. For this, there is join method in Thread class. This link shows good example of join method.