2. Thread Synchronization

Java Multithreading: Volatile – Basic Thread Communication

The second part of the advanced Java multi-threading tutorial. In this tutorial we look at using the volatile keyword to communicate between threads using flags. We also look at why the potential uses of volatile are somewhat limited.

Code For This Tutorial

Gracefully terminating a thread from another thread:

import java.util.Scanner;

class Processor extends Thread {

    

    private volatile boolean running = true;

    

    public void run() {

        

        while(running) {

            System.out.println("Running");

            

            try {

                Thread.sleep(50);

            } catch (InterruptedException e) {

                // TODO Auto-generated catch block

                e.printStackTrace();

            }

        }

    }

    

    public void shutdown() {

        running = false;

    }

}

public class App {

    public static void main(String[] args) {

        Processor pro = new Processor();

        pro.start();

        

        // Wait for the enter key

        new Scanner(System.in).nextLine();

        

        pro.shutdown();

    }

}