How is BlockingQueue thread-safe?
BlockingQueue implementations are thread-safe. All queuing methods achieve their effects atomically using internal locks or other forms of concurrency control.
What is array BlockingQueue in Java?
ArrayBlockingQueue class is a bounded blocking queue backed by an array. By bounded, it means that the size of the Queue is fixed. Once created, the capacity cannot be changed. Attempts to put an element into a full queue will result in the operation blocking.
How does ConcurrentHashMap works in Java?
ConcurrentHashMap class is thread-safe i.e. multiple threads can operate on a single object without any complications. … In ConcurrentHashMap, the Object is divided into a number of segments according to the concurrency level. The default concurrency-level of ConcurrentHashMap is 16.
What is thread-safe in Java?
thread-safety or thread-safe code in Java refers to code that can safely be utilized or shared in concurrent or multi-threading environment and they will behave as expected.
Is HashMap thread-safe?
HashMap is non-synchronized. It is not thread-safe and can’t be shared between many threads without proper synchronization code whereas Hashtable is synchronized.
Is drainTo thread-safe?
So the answer to your question is that drainTo() is thread-safe, but not atomic. It is not atomic because it could throw an exception half way through draining. However, modulo that, the queue will still be in a consistent state, whether or not other threads were doing things to the queue at the same time.
What is deadlock in Java?
Deadlock describes a situation where two or more threads are blocked forever, waiting for each other. … A Java multithreaded program may suffer from the deadlock condition because the synchronized keyword causes the executing thread to block while waiting for the lock, or monitor, associated with the specified object.