Synchronization and Communication between Threads-javaTutorial-php.cn

Synchronization and Communication between Threads

Patricia Arquette

Release： 2024-11-27 07:37:09

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Synchronization and Communication between Threads
Issue: Threads can interfere with each other when accessing shared data.

Solution:
Synchronized methods

synchronized void synchronizedMethod() {
    // Código sincronizado
}

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Synchronized blocks:

synchronized (this) {
    // Código sincronizado
}

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Example of Communication:

Communication between threads using wait(), notify() and notifyAll():

class SharedResource {
    private boolean flag = false;

    synchronized void produce() {
        while (flag) {
            try {
                wait();
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
        }
        System.out.println("Producing...");
        flag = true;
        notify();
    }

    synchronized void consume() {
        while (!flag) {
            try {
                wait();
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
        }
        System.out.println("Consuming...");
        flag = false;
        notify();
    }
}

public class ThreadCommunication {
    public static void main(String[] args) {
        SharedResource resource = new SharedResource();

        Thread producer = new Thread(resource::produce);
        Thread consumer = new Thread(resource::consume);

        producer.start();
        consumer.start();
    }
}

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Conclusion

Multi-threaded programming in Java allows you to create more efficient applications, especially on multicore systems.
It is important to correctly manage access to shared resources using synchronization.
The Thread class methods and the Runnable interface are powerful tools for working with multitasking.

Sincronização e Comunicação entre Threads

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