Untitled

Java synchronized - am I doing it right?
public void setNewSessionListener(NewSessionListener newSessionListener) {
    if (this.newSessionListener != null)
        synchronized (this.newSessionListener) {
            this.newSessionListener = newSessionListener;
        }
    else
        this.newSessionListener = newSessionListener;
}

private static final Object LOCK = new Object();

synchronized (LOCK) {
    if (this.newSessionListener == null) this.newSessionListener = newSessionListener;
}

private ReentrantLock lock = new ReentrantLock();

lock.lock();
try {
  // do your synchronized code here.
}
finally {
  lock.unlock();
}