Multi Threading in Java Part 2 | Synchronization in Java | Core Java Full Course

In this video, I have discussed multi threading in java
#java #multithreading #parnikatutorials

Synchronization in Java is the capability to control the access of multiple threads to any shared resource.

Java Synchronization is better option where we want to allow only one thread to access the shared resource.

Why use Synchronization?
The synchronization is mainly used to

To prevent thread interference.
To prevent consistency problem.

Types of Synchronization
There are two types of synchronization

Process Synchronization
Thread Synchronization
Here, we will discuss only thread synchronization.

Thread Synchronization
There are two types of thread synchronization mutual exclusive and inter-thread communication.

Mutual Exclusive
Synchronized method.
Synchronized block.
Static synchronization.
Cooperation (Inter-thread communication in java)
Mutual Exclusive
Mutual Exclusive helps keep threads from interfering with one another while sharing data. It can be achieved by using the following three ways:

By Using Synchronized Method
By Using Synchronized Block

By Using Static Synchronization
Concept of Lock in Java
Synchronization is built around an internal entity known as the lock or monitor. Every object has a lock associated with it. By convention, a thread that needs consistent access to an object's fields has to acquire the object's lock before accessing them, and then release the lock when it's done with them.

From Java 5 the package java.util.concurrent.locks contains several lock implementations.

Java Synchronized Method
If you declare any method as synchronized, it is known as synchronized method.

Synchronized method is used to lock an object for any shared resource.

When a thread invokes a synchronized method, it automatically acquires the lock for that object and releases it when the thread completes its task.

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