What are synchronized methods and synchronized statements in Java Programming?

Question

I was going through SYNC protocol specification i.e 25.446 and stopped at Timestamp field since there were two terms (synchronization sequence and synchronization period) mentioned and I could not understand.
Can someone please explain these two terms and tell me what is the significance of timestamp at eNodeB when an SYNC PDU receives over M1 interface ?

Answer 1

In java,If we declare any method as synchronized (keyword) then this method will be known as synchronized method and this method is used to lock an object for any shared resource.When a thread invokes a synchronized method, it automatically acquires the lock for that object and releases it when the thread completes its task.Example:

 public class SynchronizedCounter {
    private int c = 0;
    public synchronized void increment() {
        c++;
    }
    public synchronized int value() {
        return c;
    }
}

and Synchronized Statement executes when the thread has obtained a lock for the object or the class that has been referred to in the statement. Synchronized statement contains a synchronized block, within which is placed objects and methods that are to be synchronized.See this example:

int count=0;
    public void concatenateString(String string)
    {
          synchronized(this) 
          {                                             // Synchronized Statement
          stringOne= string;
          count++;
          }
         stringList.concatenateString(string);
    }