| Numbering | Point of difference | this | super |
| 1 | Access Properties | Accessing the class attributes, if this class is not present Property from the parent class continue to look for |
Access the parent class attributes |
| 2 | Call the method | Access method of the class | Direct access to the parent class method |
| 3 | Call the constructor | This class constructor call, This class constructor must be placed in a first row |
Call the parent class constructor, It must be placed in the first row of the sub-class constructor |
| 4 | special | It represents the current object | No such concept |