Constructors for Java inheritance

Source: Internet
Author: User

1. In the inheritance of constructors, subclasses cannot inherit the constructor of the parent class. But subclasses can use the constructor of the parent class with super () or super (parameter).

<1> non-parametric constructors:

Parent class
public class Animal {
Public Animal () {
System.out.println ("Animal parent class");
};
}

Sub-class
public class Cat extends animal{
Public Cat () {

This implicitly uses super () to call the parent class of the Animal parent class

System.out.println ("Cat subclass");
};
}

Test:

public class Numbermain {
public static void Main (string[] args) {
Cat ct=new Cat ();
}
}

Results:

Animal Parent class

Cat sub-class

<2> constructor with parameters:

Constructors for Java inheritance

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