Java Concurrency - Thread Joins (Waiting thread completion)

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1 - About

The join method is a execution suspension method. It allows one thread to wait for the completion of another.

If t is a Thread object whose thread is currently executing,

t.join();

Join causes the current thread to pause execution until t's thread terminates.

Overloads of join allow the programmer to specify a waiting period.

However, as with sleep, join is dependent on the OS for timing, so you should not assume that join will wait exactly as long as you specify.

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