Java synchronized method lock on object, or method? not just on one synchronized method that thread is using; all synchronized static methods of this class as well; So the thread which will call the synchronized method addA() for example, will acquire a lock on addA() and addB() as both are synchronized So the other threads with same object cannot execute addB()
java - What does synchronized mean? - Stack Overflow Java synchronized volatile [About] => synchronized synchronized block in Java is a monitor in multithreading synchronized block with the same object class can be executed by only single thread, all others are waiting
Why is synchronized block better than synchronized method? Difference between synchronized block and synchronized method are following: synchronized block reduce scope of lock, but synchronized method's scope of lock is whole method synchronized block has better performance as only the critical section is locked but synchronized method has poor performance than block
java - When to use volatile and synchronized - Stack Overflow In short, synchronized lets you control access to a variable, so you can guarantee that updates are atomic (that is, a set of changes will be applied as a unit; no other thread can access the variable when it's half-updated) You can use it to ensure consistency of your data
java - Synchronization vs Lock - Stack Overflow The use of synchronized methods or statements provides access to the implicit monitor lock associated with every object, but forces all lock acquisition and release to occur in a block-structured way: when multiple locks are acquired they must be released in the opposite order, and all locks must be released in the same lexical scope in which
multithreading - Java Synchronized list - Stack Overflow Returns a synchronized (thread-safe) list backed by the specified list In order to guarantee serial access, it is critical that all access to the backing list is accomplished through the returned list It is imperative that the user manually synchronize on the returned list when iterating over it
java syntax: synchronized (this) - Stack Overflow In most situations, only one thread can access the "Synchronized(this)" at a time But this is not always true!! Consider the code below In my code I synchronized on a static Object as a lock and everything works fine When I change the code to synchronize on (this) multiple threads are accessing the code at the same time and it messes
multithreading - What is the difference between a synchronized method . . . For synchronized methods, the lock will be held throughout the method scope, while in the synchronized block, the lock is held only during that block scope (otherwise known as critical section) In practice, the JVM is permitted to optimize by removing some operations out of the synchronized block execution if it can prove that it can be done
Difference between volatile and synchronized in Java Firstly synchronized obtains and releases locks on monitors which can force only one thread at a time to execute a code block That's the fairly well known aspect to synchronized But synchronized also synchronizes memory In fact synchronized synchronizes the whole of thread memory with "main" memory So executing geti3() does the following: