How to use

java.util.Collections$SynchronizedList

constructor

@Override public List<E> subList(int start, int end) {
  synchronized (mutex) {
    return new SynchronizedList<E>(list.subList(start, end), mutex);
  }
}

/**
 * Returns a wrapper on the specified List which synchronizes all access to
 * the List.
 *
 * @param list
 *            the List to wrap in a synchronized list.
 * @return a synchronized List.
 */
public static <T> List<T> synchronizedList(List<T> list) {
  if (list == null) {
    throw new NullPointerException("list == null");
  }
  if (list instanceof RandomAccess) {
    return new SynchronizedRandomAccessList<T>(list);
  }
  return new SynchronizedList<T>(list);
}

@Override public List<E> subList(int start, int end) {
  synchronized (mutex) {
    return new SynchronizedList<E>(list.subList(start, end), mutex);
  }
}

@Override public List<E> subList(int start, int end) {
  synchronized (mutex) {
    return new SynchronizedList<E>(list.subList(start, end), mutex);
  }
}

  /**
   * Allows instances to be deserialized in pre-1.4 JREs (which do
   * not have SynchronizedRandomAccessList).  SynchronizedList has
   * a readResolve method that inverts this transformation upon
   * deserialization.
   */
  private Object writeReplace() {
    return new SynchronizedList<>(list);
  }
}

@Override public List<E> subList(int start, int end) {
  synchronized (mutex) {
    return new SynchronizedList<E>(list.subList(start, end), mutex);
  }
}

@Override public List<E> subList(int start, int end) {
  synchronized (mutex) {
    return new SynchronizedList<E>(list.subList(start, end), mutex);
  }
}

public List<E> subList(int fromIndex, int toIndex) {
  synchronized (mutex) {
    return new SynchronizedList<>(list.subList(fromIndex, toIndex),
                  mutex);
  }
}

@Override public List<E> subList(int start, int end) {
  synchronized (mutex) {
    return new SynchronizedList<E>(list.subList(start, end), mutex);
  }
}

static <T> List<T> synchronizedList(List<T> list, Object mutex) {
  return (list instanceof RandomAccess ?
      new SynchronizedRandomAccessList<>(list, mutex) :
      new SynchronizedList<>(list, mutex));
}

@Override public List<E> subList(int start, int end) {
  synchronized (mutex) {
    return new SynchronizedList<E>(list.subList(start, end), mutex);
  }
}

  /**
   * Replaces this SynchronizedRandomAccessList with a SynchronizedList so
   * that JREs before 1.4 can deserialize this object without any
   * problems. This is necessary since RandomAccess API was introduced
   * only in 1.4.
   * <p>
   *
   * @return SynchronizedList
   *
   * @see SynchronizedList#readResolve()
   */
  private Object writeReplace() {
    return new SynchronizedList<E>(list);
  }
}

  /**
   * Allows instances to be deserialized in pre-1.4 JREs (which do
   * not have SynchronizedRandomAccessList).  SynchronizedList has
   * a readResolve method that inverts this transformation upon
   * deserialization.
   */
  private Object writeReplace() {
    return new SynchronizedList<>(list);
  }
}

@Override public List<E> subList(int start, int end) {
  synchronized (mutex) {
    return new SynchronizedList<E>(list.subList(start, end), mutex);
  }
}

static <T> List<T> synchronizedList(List<T> list, Object mutex) {
  return (list instanceof RandomAccess ?
      new SynchronizedRandomAccessList<>(list, mutex) :
      new SynchronizedList<>(list, mutex));
}

  /**
   * Replaces this SynchronizedRandomAccessList with a SynchronizedList so
   * that JREs before 1.4 can deserialize this object without any
   * problems. This is necessary since RandomAccess API was introduced
   * only in 1.4.
   * <p>
   *
   * @return SynchronizedList
   *
   * @see SynchronizedList#readResolve()
   */
  private Object writeReplace() {
    return new SynchronizedList<E>(list);
  }
}

  /**
   * Replaces this SynchronizedRandomAccessList with a SynchronizedList so
   * that JREs before 1.4 can deserialize this object without any
   * problems. This is necessary since RandomAccess API was introduced
   * only in 1.4.
   * <p>
   *
   * @return SynchronizedList
   *
   * @see SynchronizedList#readResolve()
   */
  private Object writeReplace() {
    return new SynchronizedList<E>(list);
  }
}

  /**
   * Replaces this SynchronizedRandomAccessList with a SynchronizedList so
   * that JREs before 1.4 can deserialize this object without any
   * problems. This is necessary since RandomAccess API was introduced
   * only in 1.4.
   * <p>
   *
   * @return SynchronizedList
   *
   * @see SynchronizedList#readResolve()
   */
  private Object writeReplace() {
    return new SynchronizedList<E>(list);
  }
}

  /**
   * Replaces this SynchronizedRandomAccessList with a SynchronizedList so
   * that JREs before 1.4 can deserialize this object without any
   * problems. This is necessary since RandomAccess API was introduced
   * only in 1.4.
   * <p>
   *
   * @return SynchronizedList
   *
   * @see SynchronizedList#readResolve()
   */
  private Object writeReplace() {
    return new SynchronizedList<E>(list);
  }
}

public List<E> subList(int fromIndex, int toIndex) {
  synchronized (mutex) {
    return new SynchronizedList<>(list.subList(fromIndex, toIndex),
                  mutex);
  }
}