The extends Keyword : Inheritance « Class Definition « Java Tutorial

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Java Tutorial » Class Definition » Inheritance

5. 22. 4. The extends Keyword

You extend a class by using the extends keyword in a class declaration,

The Parent class


public class Parent {

     }

The Child class


public class Child extends Parent {

     }

5. 22. Inheritance
	5. 22. 1.	Inheritance
	5. 22. 2.	Accessibility
	5. 22. 3.	Method Overriding
	5. 22. 4.	The extends Keyword
	5. 22. 5.	Deriving a Class
	5. 22. 6.	The keyword super represents an instance of the direct superclass of the current object.
	5. 22. 7.	Derived Class Constructors: Calling the Base Class Constructor
	5. 22. 8.	Overriding a Base Class Method
	5. 22. 9.	Type Casting
	5. 22. 10.	Inheritance, constructors and arguments
	5. 22. 11.	Combining composition and inheritance
	5. 22. 12.	Inheritance and upcasting.
	5. 22. 13.	Overloading a base-class method name in a derived class does not hide the base-class versions.
	5. 22. 14.	Cleanup and inheritance
	5. 22. 15.	Creating a Multilevel Hierarchy
	5. 22. 16.	Demonstrate when constructors are called in a Multilevel Hierarchy

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