Why `this.synchronized` instead of just `synchronized` in Scala?

问题

In an example of working with JDBC in Scala, there is a following code:

this.synchronized {
  if (!driverLoaded) loadDriver()
}

Why this.synchronized instead of just synchronized?

回答1:

In scala synchronized is not a keyword, as in java.

It is in fact a member of AnyRef, which is scala equivalent for java's Object.

So to answer your question, you can either use synchronized or this.synchronized, just as you can do toString or this.toString.

来源：https://stackoverflow.com/questions/7826822/why-this-synchronized-instead-of-just-synchronized-in-scala