Synchronized methods vs Synchronized blocks

These are the two ways of achieving synchronized access in Java. In Java, a method is also a block only, but we normally refer to a block as a part of the method definition. As we know that a thread needs to acquire an appropriate monitor (which it releases when the method returns) before entering any synchronized method/block, so we can easily figure out that in case of a synchronized method a thread may need to have the lock for a longer period of time as compared to that in case of synchronized block.

Another difference is that we don't specify the particular object whose monitor is required to be obtained by a thread for entering a synchronized method whereas we can specify the particular object in case of a synchronized block.