How to construct in Java inheritance

how to construct in inheritance://A inherits from B//1. Before new A A, you need to first construct a B//2. The "super ()" keyword is used to construct B in the construction method of a (the Super keyword needs to be placed in the first row of the construction method, since B is constructed before the next one is constructed)//3. When the Super keyword is not written in the A constructor method, the compiler automatically calls the parent class without the parameter constructor (regardless of whether the parent class has no Override)//4.super () different construction methods for parent class according to incoming parameters//5.super () in a multi-layer subclass is just a construction method in a layer-up class. For example: Public classclas1{ Public Static voidMain (string[] args) {C dx=NewC ();//Call Class C    }}classA//Parent Class{        intA;  PublicA ()//non-parametric construction{System.out.println ("This is the construction method of a 1"); }                 PublicAintSZ)//Pass-Parameter construction{System.out.println ("This is the construction method of a 2"); }    }classBextendsA//b inherits from A, is the subclass of a{        intb;  PublicB ()//non-parametric construction            {            Super();//running a class-a non-parametric construction method            }             PublicBintSZ2)//Pass-Parameter construction            {            Super(22);//To run a Class A-pass parameter construction method            }        }classCextendsB//C inherits from B and is a subclass of B{    intC;  PublicC ()//C-Class construction method            {            Super(3);//Run Class B construction method, choose different construction methods depending on the parameters passed in            }}

How to construct in Java inheritance