What is a Subclass

Question

What is a  subclass  in java   I know about classes and methods  but I do not know about subclasses

User · Answer

It is a class that extends another class.

example taken from https://www.java-tips.org/java-se-tips-100019/24-java-lang/784-what-is-a-java-subclass.html, Cat is a sub class of Animal :-)

public class Animal {

    public static void hide() {
        System.out.println("The hide method in Animal.");
    }

    public void override() {
        System.out.println("The override method in Animal.");
    }
}

public class Cat extends Animal {

    public static void hide() {
        System.out.println("The hide method in Cat.");
    }

    public void override() {
        System.out.println("The override method in Cat.");
    }

    public static void main(String[] args) {
        Cat myCat = new Cat();
        Animal myAnimal = (Animal)myCat;
        myAnimal.hide();
        myAnimal.override();
    }
}

User · Answer

A subclass is a class that extends another class   public class BaseClass      public String getFoo            return  foo            public class SubClass extends BaseClass      Then     System out println new SubClass   getFoo       Will print   foo   This works because a subclass inherits the functionality of the class it extends

User · Answer

Subclass is to Class as Java is to Programming Language

User · Answer

If you have the following   public class A      public class B extends A       then B is a subclass of A  B inherits from A  The opposite would be superclass

User · Answer

Think of a class as a description of the members of a set of things  All of the members of that set have common characteristics  methods and properties    A subclass is a class that describes the members of a particular subset of the original set  They share many of characteristics of the main class  but may have properties or methods that are unique to members of the subclass   You declare that one class is subclass of another via the  extends  keyword in Java   public class B extends A           B is a subclass of A  Instances of class B will automatically exhibit many of the same properties as instances of class A   This is the main concept of inheritance in Object-Oriented programming

User · Answer

A sub class is a small file of a program that extends from some other class   For example you make a class about cars in general and have basic information that holds true for all cars with your constructors and stuff then you have a class that extends from that on a more specific car or line of cars that would have new variables methods   I see you already have plenty of examples of code from above by the time I get to post this but I hope this description helps

User · Answer

A subclass is something that extends the functionality of your existing class  I e   Superclass - describes the catagory of objects   public abstract class Fruit        public abstract Color color       Subclass1 - describes attributes of the individual Fruit objects   public class Apple extends Fruit        Color color   red       Subclass2 - describes attributes of the individual Fruit objects   public class Banana extends Fruit        Color color   yellow       The  abstract  keyword in the superclass means that the class will only define the mandatory information that each subclass must have i e  A piece of fruit must have a color so it is defines in the super class and all subclasses must  inherit  that attribute and define the value that describes the specific object   Does that make sense

User · Answer

A subclass in java  is a class that inherits from another class   Inheritance is a way for classes to add specialized behavior ontop of generalized behavior  This is often represented by the phrase  is a  relationship   For example  a Triangle is a Shape  so it might make sense to implement a Shape class  and have the Triangle class inherit from it  In this example  Shape is the superclass of Triangle and Triangle is the subclass of Shape

[java] What is a Subclass

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