Introduction to Java
History of Java
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Java was released in 1996 by James Gosling at Sun Microsystems
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"Write once, run anywhere"
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Based on C/C++
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OOP (Object-Oriented Programming )
Why Java?
Preparation
Installing Java SE 8
Editor
(NetBeans, BlueJ, Notepad++, etc)
Code Conventions
Naming Rules
- Class names are written in UpperCamelCase
- Method names are written in lowerCamelCase
- Variable names are written in lowerCamelCase
- Constant names use CONSTANT_CASE: all uppercase
example
| Prose form | correct | incorrect |
|---|---|---|
| "XML HTTP request" | XmlHttpRequest | XMLHTTPRequest |
| "new customer ID" | newCustomerId | newCustomerID |
| "inner stopwatch" | innerStopwatch | innerStopWatch |
Let's code...
Example Code (HelloWorld.java)
public class HelloWorld {
public static void main (String[] args) {
String language = "Java";
System.out.println("Hello World");
System.out.println("Happy Coding with " + Language);
}
}Introduction to Java
By Nur Ratna Sari
