Method overloading and method overriding

Method overloading @Overload

• The same method name
• Method of parameter type, number, sequence, at least one different
• The return value may not be the same type
• The method may not be the same modifier

Method overloading @Override

• Covering only exist (including parent and parent profile) subclasses and superclasses between. In the same class can be overridden methods can not be overridden
• Subclass name, return type and signature parameters must be the name of the parent class method, signature and return type parameters consistent
• Subclass method can not be reduced access to the parent class method
• Subclass method can not throw more parent class for exception
• Parent class static methods can not be overridden by subclasses non-static method
• Subclasses can be defined as static methods with the same name as the parent class static method, a static method in order to hide the parent class in subclasses
• Private methods of the parent class can not be covered
• Method abstract parent class can be subclassed to cover in two ways:

1. Subclasses implement the abstract parent class method
2. Abstract subclass re-statement of the parent class

• The method of non-abstract parent class can be overridden abstract method