No synchronize : Lock Synchronize « Threads « Java

1. Java
2. Threads
3. Lock Synchronize

No synchronize

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

  public static 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
    }
  }
}


           
         
    
    
    
    
  

Related examples in the same category

1.	Thread: Dining Philosophers
2.	Synchronizing on another object
3.	Operations that may seem safe are not, when threads are present
4.	Synchronizing blocks instead of entire methods
5.	Boolean lock
6.	Static synchronized block
7.	Thread notify
8.	Thread deadlock
9.	Synchronize method
10.	Threads join
11.	Static synchronize
12.	Thread synchronization
13.	Synchronized Block demo
14.	Interruptible Synchronized Block
15.	Signaling
16.	Simple Object FIFO
17.	Object FIFO
18.	Byte FIFO
19.	Daemon Lock
20.	Determining If the Current Thread Is Holding a Synchronized Lock
21.	Handle concurrent read/write: use synchronized to lock the data
22.	Lock for read and write
23.	Read Write Lock
24.	Coordinates threads for multi-threaded operations
25.	A reader-writer lock from "Java Threads" by Scott Oak and Henry Wong.
26.	Invoke a series of runnables as closely to synchronously as possible
27.	This program shows how multiple threads can safely access a data structure, using synchronized methods
28.	This program shows data corruption when multiple threads access a data structure.
29.	Stores a single object for the producer/consumer pattern and takes care of thread synchronization.
30.	The BooleanLock class provides a useful encapsulation of a boolean variable that is easily and safely accessed from multiple theads.