What is CountDownLatch? CountDownLatch was introduced with JDK 1.5 along with other concurrent utilities like CyclicBarrier, Semaphore, ConcurrentHashMap and BlockingQueue in java.util.concurrent pac...Siloti/KD
Friends with a little Java programming experience know that the essence of Java is in the juc package, which is the masterpiece of the famous old man Doug Lea. To evaluate a programmer's Java level, to a certain extent, it depends on his mastery of some technologies under the juc package...
It is used to execute tasks sequentially. As the name indicates, it is a thread pool of a fixed number of threads. The tasks submitted to the executor are executed bythe n threadsand if there is more task they are stored on a LinkedBlockingQueue. It uses Blocking Queue. Does future get...
Map<String,String>mutableMap=newHashMap<>();mutableMap.put("key1","value1");Map<String,String>unmodifiableMap=Collections.unmodifiableMap(mutableMap);//Throws java.lang.UnsupportedOperationException//unmodifiableMap.put("key2", "value2");//Changes are visible in both mapsmutableMap.put("key2"...
import java.util.Properties; import java.util.concurrent.ArrayBlockingQueue; import java.util.concurrent.ExecutorService; import java.util.concurrent.ThreadPoolExecutor; import java.util.concurrent.TimeUnit; public class ThirdMutiConsumerThreadDemo { ...
Fixed - RLock.unlock() results in ERR hash value if RedisLabs hosting is used Fixed - RPriorityBlockingQueue.poll() method with limit implemented Fixed - redisson__map_cache__last_access__set* objects continuously grow in size if RMapCache.maxSize defined Fixed - Eviction task is not stopp...
Java Concurrent Collection Classes BlockingQueue– an interface that is at the base of all Queue based concurrent collections. While adding an element to a BlockingQueue, if there is no space it can wait till it becomes available and when retrieving, it will wait till an element is available ...