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The Abstract Window Toolkit (AWT) is a Java library that provides a collection of native platform-independent graphical user interface (GUI) components, such as buttons, checkboxes, and text boxes. AWT allows Java developers to create user interfaces that work seamlessly on various operating systems.

An applet is a small Java program that can be embedded in a web page and runs in a web browser. Java applets provide interactive features and graphical user interfaces to web pages. The main difference between a Java application and a Java applet is that applets run within a web browser, while applications run as standalone programs.

Inheritance is one of the fundamental principles of object-oriented programming (OOP) and allows you to create a new class that inherits properties and methods from an existing parent class. In Java, the keyword "extends" is used to establish an inheritance relationship between classes.

To create an applet using the AWT library, your applet class should inherit from the `java.applet.Applet` class. To inherit the `Applet` class, you need to use the "extends" keyword followed by the class name "Applet" in your class definition. The `java.applet.Applet` class provides the necessary methods and functionalities for creating an applet using the AWT library. Here's an example of a simple AWT applet: ```java import java.applet.Applet; import java.awt.Graphics; public class MyAWTApplet extends Applet { @Override public void paint(Graphics g) { g.drawString("Hello, AWT Applet!", 25, 50); } } ``` In the example above, the class `MyAWTApplet` is inheriting from the `Applet` class, which provides the necessary methods and functionalities to create an AWT applet. The `paint` method is overridden to display a custom message on the applet's surface.