java.lang.InterruptedException is thrown when a Thread blocked in Object.wait(), Thread.join(), or Thread.sleep() is interrupted. Here we’ll look at these cases.

java.lang.IllegalMonitorStateException form Object’s notify/wait methods indicates basic synchronization issue. In this post we’ll show the reason and how to fix it!

Java CyclicBarrier is very convenient synchronization tool for writing concurrent simulations. In this post we’ll show how it works and write a game simulation.

Problem: How to use Java ScheduledThreadPoolExecutor to schedule tasks for one-time or repeated execution? In this post we’re going to show newer alternative to Timer/TimerTask pair.

Problem: How to use Java Timer and TimerTask to schedule tasks execution at specified time or in repeated manner? In this post we’re going to show cooperation of these two classes.

Problem: How to use Java CountDownLatch to synchronize one or more tasks? The CountDownLatch is one of the most useful and easy to use classes from java.util.concurrent package. Learn how to use it!