title: Java synchronized static methods: lock on object or class
body: <p>The Java documentation says: </p>
  
  <blockquote>
    <p>It is not possible for two invocations of synchronized methods on the
    same object to interleave.</p>
  </blockquote>
  
  <p>What does this mean for a static method?  Since a static method has no associated object, will the synchronized keyword lock on the class, instead of the object?</p>