Open Source Your Knowledge, Become a Contributor

Technology knowledge has to be shared and made accessible for free. Join the movement.

Create Content

Ineffectual Synchronization - Part I

To illustrate how subtle concurrency issues are and how hard they are to miss, we will make a very small change that may look extremely inconspicuous:

class Task implements Runnable {
static int sum = 0;
synchronized public void run() { ++sum; }
public class Main {
public static void main(String args[]) throws Exception {
for (int i = 0; i < 10000; i++) {
new Thread(new Task()).start();
Open Source Your Knowledge: become a Contributor and help others learn. Create New Content