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Creational patterns

Cigarette smokers problem using Semaphore

Problem Statement: The cigarette smokers problem was first presented by Suhas Patil in 1971. There are three smokers and one agent. A c...
Sleeping barber problem using Semaphores

Problem Statement: The barber has one barber chair and a waiting room with a number of chairs in it. When the barber finishes cutting a...
Sleeping barber problem using Reentrant Locks

Problem Statement: The barber has one barber chair and a waiting room with a number of chairs in it. When the barber finishes cutting a...
ReentrantReadWriteLock in java

ReentrantLock which is explained here is efficient is many scenarios. However they follow a conservative locking strategy that prevents w...
Reentrant Lock in Java

- ReentrantLock in Java is added on java.util.concurrent package in Java 1.5 along with other concurrent utilities. - ReentrantLock imple...
Singleton Pattern in Java

Definition: The singleton pattern is a design pattern that restricts the instantiation of a class to one object. This is useful wh...
Use of Volatile variable w.r.t. to Synchronization

I'm going to talk about what volatile means in Java. First, you have to understand the Java memory model. And what would be the best ...