Introduction to the Java platform, Java virtual machine, loading classes, Java API

1. Introduction to Java Programming - internals

5. What is Computer Programming?

8. Your First Java Program

9. First Look at Java Code Sample Java Source code: public class HelloJava { public static void main(String args[]) { System.out.println("Hello, Java"); } }

10. Java Code – How It Works? public class HelloJava { public static void main(String args[]){ System.out.println("Hello, Java"); } } Define a class called " HelloJava " Define the main() method – the program entry point Print a text on the console calling the method " println() " of the system's standard output

11. Java Is Case Sensitive! public class HelloJava { public static void Main(String args[]){ system.out.PrintLn("Hello, Java"); } } The keyword class should be lowercase The class System should be in " Pascal Case " The method println() should be in " camel Case " The correct method name is main()

12. Java Code Should Be Well Formatted public class HelloJava { public static void main(String args[]) { System.out.println("Hello, Java"); } } The { symbol should be on the same line. The block after the { symbol should be indented by a TAB Class names should start with a CAPITAL letter The { symbol should be on the same line. The } symbol should be under the beginning of the line with corresponding {

13. Example of Bad Formatting public class HelloJava {public static void main(String args[]){ System.out.println ("Hello, Java"); System.out.println("Hello, Java");} } Such formatting makes the code unreadable

15. Your First Java Program Live Demo

16. Welcome to Java Technology

21. Java Platform Architecture

23. Java, JVM and OS

24. Java 5 Architecture

25. Java Compilation and Execution public class HelloJava { public static void main(String args[]) { System.out.println( "Hello, Java"); } } HelloJava.java Compilation 0010011101011101110101110101011101110101101101101110101011010101010101010101010101101110100011010000001011010111101101110101001110100110101010101101011111101010111010100101011101010100101001111101101010101110101010001010101001011000101010011101010100110101110110111110101 HelloJava.class Execution

26. The Java Programming Environment

28. Java Platform Editions

31. Java Virtual Machine (JVM)

36. The JVM and Host Operating Systems

37. Classes and Class Loaders

39. Class Loaders Architecture

45. Eclipse Compiling, R unning and D ebugging Java P rograms

53. Eclipse Compiling, R unning and D ebugging Java P rograms Live Demo