Explore multithreading and concurrency concepts in Java, from the basics on upward.

Java for Programmers

Java Multithreading


# Missed Signals 
    
<p>A missed signal happens when a signal is sent by a thread before the other thread starts waiting on a condition. This is exemplified by the following code snippet. Missed signals are caused by using the wrong concurrency constructs. In the example below, a condition variable is used to coordinate between the <b>signaller</b> and the <b>waiter</b> thread. The condition is signaled at a time when no thread is waiting on it causing a missed signal.</p>

<p>In later sections, you'll learn that the way <span>we are using the condition variable's <code>await</code> method is incorrect. The idiomatic way of using <code>await</code> is in a while loop with an associated boolean condition.</span> For now, observe the possibility of losing signals between threads.</p>    

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