Java OOP Programming language (Part 1) - Introduction to Java
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This document provides an introduction to Java programming, covering its history, features, and development tools. It explains the basics of creating and executing Java applications, including sample code for a simple program. Key concepts such as classes, methods, and the structure of the main method are also discussed.
![A Simple Application
Example 1.1
//This application program prints Welcome
//to Java!
package chapter1;
public class Welcome {
public static void main(String[] args) {
System.out.println("Welcome to Java!");
}
}
7](https://image.slidesharecdn.com/1-160916032054/85/Java-OOP-Programming-language-Part-1-Introduction-to-Java-7-320.jpg)
![main Method
The main method provides the control of
program flow.The Java interpreter executes
the application by invoking the main method.
The main method looks like this:
public static void main(String[] args)
{
// Statements;
} 14](https://image.slidesharecdn.com/1-160916032054/85/Java-OOP-Programming-language-Part-1-Introduction-to-Java-14-320.jpg)
Java OOP Programming language (Part 1) - Introduction to Java
- 1. Java Programming - Intro Oum Saokosal Master’s Degree in information systems,Jeonju University,South Korea 012 252 752 / 070 252 752 oumsaokosal@gmail.com
- 2. Contact Me • Tel: 012 252 752 / 070 252 752 • Email: oumsaokosal@gmail.com • FB Page: https://facebook.com/kosalgeek • PPT: http://www.slideshare.net/oumsaokosal • YouTube: https://www.youtube.com/user/oumsaokosal • Twitter: https://twitter.com/okosal • Web: http://kosalgeek.com
- 3. History •JamesGosling and Sun Microsystems •Oak •Java, May 20, 1995, SunWorld •JavaApplet •Java SE,Java EE, Java Java ME •Android uses Java, doesn’t use JVM 3
- 4. Features of Java • Java is object-oriented • Java is interpreted • Java is architecture-neutral • Java is portable • Java is multithreaded • Java is dynamic 4
- 5. Java IDETools • Eclipse • Netbeans • IntelliJ IDEA 5
- 6. Getting Started with Java Programming •A SimpleJavaApplication •Compiling Programs •ExecutingApplications 6
- 7. A Simple Application Example 1.1 //This application program prints Welcome //to Java! package chapter1; public class Welcome { public static void main(String[] args) { System.out.println("Welcome to Java!"); } } 7
- 8. ExecutingApplications •Compile: javac Welcome.java •Run: java Welcome.class 8 Java Interpreter on Windows Java Interpreter on Sun Solaris Java Interpreter on Linux Bytecode Java Interpreter on Mac OS
- 9. Comments In Java,comments: //this is a single line comment /* this is a multiline comment */ 9
- 10. Reserved Words Reservedwords or keywords: - class - public - static - void - int - package 10
- 11. Modifiers public private protected (default) 11
- 12. Classes A class is a template or blueprint for objects. public class Welcome { } 12
- 13. Methods Method: a collection of statements that performs a sequence of operations It can be used even without fully understanding the details of how it works. 13
- 14. main Method The main method provides the control of program flow.The Java interpreter executes the application by invoking the main method. The main method looks like this: public static void main(String[] args) { // Statements; } 14