In this post we’ll see what is volatile keyword in Java, when to use volatile variable and what is the reason for declaring variable as volatile. What is volatile keyword in Java To know volatile keyword in Java better you would have to know a little about the optimizations that…
In a multi-threaded environment a thread often acts in response to the action of another thread. If the other thread’s action is also a response to the action of another thread then a livelock may happen if two or more threads are busy responding to the action of each other…
In a multi-threaded environment access to shared resources is synchronized so that at any given time only a single thread can enter a synchronized context. Theoretically all the threads trying to gain access to a synchronized block or method should get some CPU time periodically but in practice that may…
In a multi-threaded environment a shared object would need synchronization to avoid corruption through concurrent access, but synchronization is expensive. Another alternative is to give each thread its own instance and avoid sharing of data. That’s what ThreadLocal class in Java does. ThreadLocal class in Java provides thread local variables…
In this post we’ll see the difference between sleep() and yield() methods in Java. Since both of these methods sleep() and yield() cause the currently executing thread to suspend its execution some users find it confusing to differentiate between sleep and wait methods. So let’s try to see the difference…
In this post we’ll see the difference between sleep() and wait() methods in Java. Since both of these methods sleep() and wait() cause the currently executing thread to suspend its execution some users find it confusing to differentiate between sleep and wait methods. So let’s try to see the difference…
Thread.sleep method in Java multi-threading causes the currently executing thread to suspend execution for a specified period. In Java Thread class there are two overloaded sleep() methods- static void sleep(long millis) throws InterruptedException – Causes the currently executing thread to sleep for the specified number of milliseconds. static void sleep(long…
In your application you may have a scenario where you spawn a bunch of threads to execute some logic and you want to start any further processing only after all the threads have finished the execution. Which means you need some way to know whether a thread is terminated or…
In a multi-threaded environment there may come a situation when one thread is waiting for a resource that is locked by another thread, which in turn is waiting for another thread and so on until this dependency loops back to the first waiting thread. Thus all the threads are waiting…
Race condition in Java may occur in a multi-threaded language like Java when two or more threads try to access a shared resource. If all the threads are just reading a shared object that poses no problem but modifying or writing a value may lead to incorrect results because of…