Introduction

Inheritance is a basic object oriented feature in which one class acquires and extends upon the properties of another class, using the keyword extends. For Interfaces and the keyword implements, see interfaces.

Syntax

• class ClassB extends ClassA {…}
• class ClassB implements InterfaceA {…}
• interface InterfaceB extends InterfaceA {…}
• class ClassB extends ClassA implements InterfaceC, InterfaceD {…}
• abstract class AbstractClassB extends ClassA {…}
• abstract class AbstractClassB extends AbstractClassA {…}
• abstract class AbstractClassB extends ClassA implements InterfaceC, InterfaceD {…}

Remarks

Inheritance is often combined with generics so that the base class has one or more type parameters. See Creating a Generic Class.

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