For example, is this better? try { synchronized (bean) { // Write something } } catch (InterruptedException e) { // Write something } Or it's better this: synchronized (bean) { try { //...

I know that when you synchronize a block of code, you specify which object's lock you want to use as the lock, so you could, for example, use some third-party object as the lock for this piec...

I have few doubts about synchronized blocks. Before my questions I would like to share the answers from another related post Link for Answer to related question. I quote Peter Lawrey from the same...

Let's say I have an object as follows: Map<String, String> m = new HashMap<>(); Then I synchronize on this object as follows and change its reference: synchronize(m){ m = new HashM...

One of my application suddenly fails on startup, with the following error message : java.lang.VerifyError: Rejecting class com.sample.BufferManagerImpl because it failed compile-time verifica...

What is the difference between a synchronized method and synchronized block in Java ? I have been searching the answer on the Net, people seem to be so unsure about this one :-( My take wou...

This exercise is straight out of SCJP by Kathy Seirra and Bert Bates Synchronizing a Block of Code In this exercise we will attempt to synchronize a block of code. Within that block of code we wi...

public class ObjectCounter { private static long numOfInstances = 0; public ObjectCounter(){ synchronized(this){ numOfInstances++; } } **public static synchronized long getCount(){ return n...

I was reading the JVM specification to try to figure out how to properly handle monitors. The example they give in the relevant section looks like this: 0 aload_1 // Push f 1 dup // Duplicate it o...

I'm building a multithreaded application, from which more than one thread can write to an sqlite3 database including the main thread. I declared a static public variable to be used for the mutex: ...

I have a Collections.synchronizedList of WeakReference, _components; I wrote something like the following, expecting the complier to complain: public boolean addComponent2(Component e) { synchro...

I see this: // thread is a member of this class synchronized( this.thread ) { this.thread.running = false; this.thread.notifyAll(); // Wake up anything that was .waiting() on // the thread th...

I was trying to cut thread contention in my code by replacing some synchronized blocks with AtomicBoolean. Here's an example with synchronized: public void toggleCondition() { synchronized (this...

I know the difference between synchronized method and synchronized block but I am not sure about the synchronized block part. Assuming I have this code class Test { private int x=0; private Obj...