Synchronization in java

          Synchronization is a method which makes the one thread can access the shared resource at a time. The shared resource can be a variable, object or methods. The shared data can be used effectively.

Features:

The features are given below.

• ·       Data integrity.
• ·       Thread safety is achieved.
• ·       Race condition is effectively handled.
• ·       It prevents data inconsistency.

Let us create a synchronized block in java.

Program: To create synchronization in java

• This program creates a class for thread which is “Th_Sample”. It has two methods “incre()” and “getIt()”.
• “incre()” method is used to increment the value.
• “getIt()” method gets the input value.
• Next, a main class is created as “S_Sample”.
• The object for Th_sample is created.
• Two thread objects are created. Each one has separate for loop to count the value.
• Start the two threads. Using try,catch block, run the threads.
• Finally,print the value.

Code:

class Th_Sample{

        // The Shared variable is named as ‘x’.

    private int x = 0;

    // Synchronized method to increase the value

    public synchronized void incre(){

        x++;

            }

    // Synchronized method to get the input

    public synchronized int getIt(){

        return x;

        }

}

public class S_Sample{

    public static void main(String[] args){

    // Shared resource between threads

        Th_Sample s1 = new Th_Sample();

        Thread t1 = new Thread(() -> {

            for (int i = 0; i < 300; i++)

                s1.incre();

        });

        Thread t2 = new Thread(() -> {

            for (int i = 0; i < 1000; i++)

                s1.incre();

        });

        t1.start();

        t2.start();

        try {

            t1.join();

            t2.join();

        }

        catch (InterruptedException e) {

            e.printStackTrace();

        }

        System.out.println("The Counter value is : " + s1.getIt());

    }

}

Output:

Compile and run the program to get the output.

C:\raji\blog>javac S_Sample.java

C:\raji\blog>java S_Sample

The Counter value is : 1300

The synchronization in java with sample code is explained here. Hope, this code is useful to you. Keep Coding!!!!