Use of join in java
Introduction join() is a method we often use in java that sets the current thread to the WAITTING state and then waits for the calling thread to finish executing or be interrupted.
Definition join() is a method defined in Thread, let’s look at his definition.
/** * Waits for this thread to die. * * <p> An invocation of this method behaves in exactly the same * way as the invocation * * <blockquote> * {@linkplain #join(long) join}{@code (0)} * </blockquote> * * @throws InterruptedException * if any thread has interrupted the current thread.