Posts about Java concurrent utils package. Concurrent collections. blocking queues, non-blocking queues, synchronizers.
Both CountDownLatch and CyclicBarrier are synchronization aids in Java concurrency that facilitate communication among threads. Both of these synchronization aids create a latch or a barrier to make threads wait until a condition is satisfied and then only the threads can make further progress. In this post we’ll see the…
Many synchronization aid were added as the part of java.util.concurrent package in Java 5 like Semaphore, Exchanger. One more synchronization aid added as part of Java concurrency is Phaser which was added in Java 7. Table of contents Phaser in Java concurrency Java Phaser constructors How Phaser works in Java…
Many synchronization aid were added as the part of java.util.concurrent package in Java 5 like CyclicBarrier, Semaphore. One more synchronization aid added as part of Java concurrency is Exchanger. In this post we’ll see what is Exchanger in Java, how does it work and an example of Exchanger. Exchanger in…
Semaphore is a synchronization aid that can be used for inter-communication among threads or to restrict access to resource. An implementation of Semaphore in Java is available for out of box use and it is part of java.util.concurrent package. Table of contents Counting semaphore Java semaphore constructors Semaphore example in…
ArrayList is part of Java from version 1.2 where as CopyOnWriteArrayList was added in Java 5 as a thread-safe variant of ArrayList. In this post we’ll see the differences between ArrayList and CopyOnWriteArrayList in Java. CopyOnWriteArrayList Vs ArrayList in Java 1- Thread Safety: CopyOnWriteArrayList is thread safe. Thread safety in…
ConcurrentHashMap in Java is a thread safe Map implementation which provides another alternative to be used in a multithreaded environment apart from HashTable or explicitly synchronizing HashMap. Where as HashMap in Java is not synchronized so not thread safe but provides better performance. In this post we’ll see the difference…
CountDownLatch in Java is a synchronization aid that allows one or more threads to wait for a set of operations being performed in other threads to complete. CountDownLatch class was added in Java 1.5 and it is part of java.util.concurrent package in Java. Table of contents How CountDownLatch works in…
The java.util.concurrent package provides many synchronizer utilities that cover the use cases where several thread communicate with each other and some sort of synchronizer is needed to regulate that interaction among the threads. CyclicBarrier in Java is one such synchronization aid that is useful when you want threads to wait…
ConcurrentHashMap in Java is a thread safe Map implementation which provides another alternative to be used in a multithreaded environment apart from HashTable or explicitly synchronizing HashMap. ConcurrentHashMap is part of the java.util.concurrent package. Table of contents How is ConcurrentHashMap a better option Internal implementation of ConcurrentHashMap in Java Java…
CopyOnWriteArrayList in Java implements the List interface just like its other well known counterpart ArrayList and is part of java.util.concurrent package. How CopyOnWriteArrayList differs from ArrayList is that it is a thread-safe variant of ArrayList. For more differences between CopyOnWriteArrayList and ArrayList in Java refer this post- Difference Between ArrayList…
