This document provides an overview of the Java programming language. It discusses key Java concepts like object-oriented programming, classes, objects, inheritance, encapsulation and the Java API. It also describes how to write Java applets and applications, common errors, and the lifecycle of an applet.

1. Chapter 1 Introducing Java

7. Traditional Languages are Compiled

8. Java Applets and Applications are Compiled

11. Partial List of Core Java API Packages Core functions of the language, automatically included java.lang Handle input and output of data java.io Create software components java.beans Graphical components using abstract windows toolkit java.awt Create applets java.applet Purpose Package

12. Partial List of Core Java API Packages Continued Purpose Package Provide utilities such as dates java.util Manipulate text including searches java.text GUI using Java Foundation Classes java.swing Query databases java.sql Manage certificates, signatures, and other security java.security Remote objects java.rmi Networking java.net Handle math functions, very large integers and decimal values java.math

13. Java has Several Levels of Security

16. Inheritance of Java Objects

21. Class Diagram

29. The Methods in the Life Cycle of an Applet Executes prior to shut down of the browser destroy Executes when the browser leaves a Web page containing the applet stop Follows the init and reexecutes each time that the page displays start Executes the first time an applet is loaded init Purpose Method

30. Class Diagram