Java Multithreading Tutorial for Beginners #8: Thread Synchronization - Why and How

In this chapter, we will learn about thread synchronization. When we work on parallel execution, we will soon come to a point where data becomes inconsistent because of simultaneous access of shared resources from multiple threads.

In this video, we will see a real example of synchronization issue and will fix it using synchronization with "synchronized" keyword.

You can find the source code of this chapter in the following GitHub repository.

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[tompol]

one of the best videos about hava threads THANK you !!!!

[erfelipe]

Another important topic ! In fact, I'm using in a crawler project, synchronizedList to avaliable access to threads.
Crawler.fila_a_visitar = new PriorityBlockingQueue<>(taminifila, new url_comparator());
Crawler.fila_visitada = ArrayList<>());
Crawler.fila_dominio_unicos = new ConcurrentHashMap<>();

[kapilbablani]

#GenuineCoder Sir, I have used CopyOnWriteArrayList to be passed as List instead of ArrayList, it is not giving expected output, why ?
If CopyOnWritearrayList is thread safe, it should give me the correct output without the synchronized block, explain ?