Local Variables

• Local (method, automatic, or stack) variable declarations cannot have access modifiers.
• final is the only modifier available to local variables.
• Local variables don't get default values, so they must be initialized before use. 
• final methods cannot be overridden in a subclass.
• abstract methods are declared, with a signature, a return type, and an optional throws clause, but are not implemented.
• abstract methods end in a semicolon—no curly braces.
• Three ways to spot a non-abstract method:
• The method is not marked abstract.
• The method has curly braces.
• The method has code between the curly braces.
• The first nonabstract (concrete) class to extend an abstract class must implement all of the abstract class' abstract methods.
• The synchronized modifier applies only to methods and code blocks.
• synchronized methods can have any access control and can also be marked final.