[Java] [VIDEO] Notes-inheritance

1 overloaded (overload) [Class]: The method name in a class is the same, but the parameters are different.

Override (override) [Inherit]: Must have the same method name, parameter list, and return value as the overridden method.

The overriding method cannot use more restrictive access than the overridden method. That is, overriding method access is larger than overridden methods.

The 2 this keyword represents a reference to an object that uses the method.

This can be seen as a variable whose value is a reference to the current object.

　　

3 How to construct in inheritance

If you do not explicitly call the base class construction method in the self-ray construction method, the system defaults to calling the base class parameterless construction method.

If the subclass constructor method does not explicitly call the base class construction method, and there is no parameterless constructor in the base class, the compilation error occurs.

[Java] [VIDEO] Notes-inheritance