In this post we’ll see two of the interesting features of the concurrent API, Callable and Future in Java. Table of contents Callable in Java Callable interface Running a Callable task using ExecutorService Java Callable and Future example Future in Java Callable and Future example Callable in Java Consider a…
LinkedBlockingQueue in Java is an implementation of BlockingQueue interface and is part of java.util.concurrent package. LinkedBlockingQueue has the features of both ArrayBlockingQueue and DelayQueue. ArrayBlockingQueue is a bounded blocking queue where as DelayQueue is an unbounded blocking queue. LinkedBlockingQueue sits in the middle as it is an optionally-bounded blocking queue…
ArrayBlockingQueue is a bounded blocking queue which internally uses an array to store elements. This queue orders elements FIFO (first-in-first-out). The head of the queue is the element that has been on the queue the longest time. The tail of the queue is that element that has been on the…
PriorityBlockingQueue in Java is an implementation of BlockingQueue interface and is part of java.util.concurrent package. PriorityBlockingQueue is an unbounded queue PriorityBlockingQueue is logically unbounded, that’s how it differs from ArrayBlockingQueue which is a bounded queue and LinkedBlockingQueue which is optionally-bounded. PriorityBlockingQueue though unbounded is created with an initial capacity which…
Condition interface which resides in java.util.concurrent.locks has methods for inter thread communication similar to Object class monitor methods (wait, notify and notifyAll). Condition provides methods like await(), signal(), signalAll(). Where a Lock replaces the use of synchronized methods and statements, a Condition replaces the use of the Object monitor methods.…
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…
java.util.concurrent.atomic package in Java has classes that support lock free atomic operations. That means using classes contained in this package atomicity of operations is guaranteed for integer, long, boolean values along with object references and arrays with out using explicit synchronization or locks. In this post we’ll discuss one of…
In Java there are two ways to implement a class whose instances are to be executed by a thread. By implementing Runnable interface. By implementing Callable interface. Check this post Difference Between Runnable And Callable in Java to know the differences between Runnable and Callable in Java. But what if…
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.…
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;…
