StaticSync.java Source code

Introduction

Here is the source code for StaticSync.java

Source

public class StaticSync extends Object {
    private static int nextSerialNum = 10001;

    public static synchronized int getNextSerialNum() {
        int sn = nextSerialNum;

        try {
            Thread.sleep(1000);
        } catch (InterruptedException x) {
        }

        nextSerialNum++;
        return sn;
    }

    private static void print(String msg) {
        String threadName = Thread.currentThread().getName();
        System.out.println(threadName + ": " + msg);
    }

    public static void main(String[] args) {
        try {
            Runnable r = new Runnable() {
                public void run() {
                    print("getNextSerialNum()=" + getNextSerialNum());
                }
            };

            Thread threadA = new Thread(r, "threadA");
            threadA.start();

            Thread.sleep(1500);

            Thread threadB = new Thread(r, "threadB");
            threadB.start();

            Thread.sleep(500);

            Thread threadC = new Thread(r, "threadC");
            threadC.start();

            Thread.sleep(2500);

            Thread threadD = new Thread(r, "threadD");
            threadD.start();
        } catch (InterruptedException x) {
            // ignore
        }
    }
}