| |
Overload |
Override |
|---|---|---|
| Method name | the same | the same |
| parameter list | Different (number or data type of corresponding position) | the same |
| Return value type | Irrelevant | the same |
| Modifier | Irrelevant | Access rights are not less than the method being overridden |
| Define location | In the same class | Child parent class |
Method overloading : a means for classes to handle different types of data in a unified way.
Method rewriting : reflects the polymorphism between the parent class and the child class, and the child class redefines the function of the parent class. If a method defined in a subclass has the same method name, parameter list, and return value type as its parent class, we say that the method is overridden (Override).
Rough understanding: Method rewriting means everything is the same, and the method body may be different. Method overloading means that the method name is the same, the parameter list is different, and it has nothing to do with the return value type and modifiers.