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.
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![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)
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Since then I have worked for major corporations like T-Mobile and Microsoft and many more, and I have founded a startup. I've also been teaching product management to ensure my students save time and money to get to the same level as me faster avoiding popular mistakes. Today as I’ve transitioned to teaching and focusing on the startup, I hear everybody being concerned about Ai stealing their jobs… We’ll talk about it shortly.
But before that, I want to take you back to 1997. One of my favorite movies is “Fifth Element”. It wowed me with futuristic predictions when I was a kid and I’m impressed by the number of these predictions that have already come true. Self-driving cars, video calls and smart TV, personalized ads and identity scanning. Sci-fi movies and books gave us many ideas and some are being implemented as we speak. But we often get ahead of ourselves:
Flying cars,Colonized planets, Human-like AI: not yet, Time travel, Mind-machine neural interfaces for everyone: Only in experimental stages (e.g. Neuralink).
Cyberpunk dystopias: Some vibes (neon signs + inequality + surveillance), but not total dystopia (thankfully).
On the bright side, we predict that the working hours should drop as Ai becomes our helper and there shouldn’t be a need to work 8 hours/day. Nobody knows for sure but we can require that from legislation. Instead of waiting to see what the government and billionaires come up with, I say we should design our own future.
So, we as humans, when we don’t know something - fear takes over. The same thing happened during the industrial revolution. In the Industrial Era, machines didn’t steal jobs—they transformed them but people were scared about their jobs. The AI era is making similar changes except it feels like robots will take the center stage instead of a human. First off, even when it comes to the hottest space in the military - drones, Ai does a fraction of work. AI algorithms enable real-time decision-making, obstacle avoidance, and mission optimization making drones far more autonomous and capable than traditional remote-controlled aircraft. Key technologies include computer vision for object detection, GPS-enhanced navigation, and neural networks for learning and adaptation. But guess what? There are only 2 companies right now that utilize Ai in drones to make autonomous decisions - Skydio and DJI.
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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 [email protected]
- 2. Contact Me • Tel: 012 252 752 / 070 252 752 • Email: [email protected] • 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
- 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