Posts about Java concurrent utils package. Concurrent collections. blocking queues, non-blocking queues, synchronizers.
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…
In this Java executor tutorial you’ll learn how to use Executor, ExecutorService, ScheduledExecutorService and their thread pool implementations to effectively manage threads in a large scale application. Table of contents Java Executor API Java Executor interface Java ExecutorService interface Java ScheduledExecutorService interface Java Executor implementation classes Creating executors using Executors…
Java programming language provides two ways to implement a class whose instances are to be executed by a thread. By implementing Runnable interface By implementing Callable interface Since there are two options so they must have some differences in the features they offer, that’s what we’ll discuss in this post;…
In this post we’ll learn about CompletableFuture class in Java along with examples to understand the functionalities this class provides. CompletableFuture in Java CompletableFuture is used for asynchronous computation of the task where the task is executed by a separate thread and the result is returned when it is ready.…
