0 Fundamentals of Android Development Java language Learning 01-What is Java

First, what is Java?

Java is a generic term for the Java Object-oriented programming language and Java platform introduced by Sun Microsystems Company in May 1995. Co-developed by James Gosling and co-workers, and was formally launched in 1995.

Java consists of three systems:

• Javase (J2SE) (JAVA2 Platform standard Edition,java platform version)
• EE (Java 2 platform,enterprise Edition,java Platform Enterprise Edition)
• Javame (J2ME) (Java 2 Platform Micro Edition,java Platform mini version).

On the basis of the Java platform, we can develop client programs, web-side programs, mobile phone programs.

Second, learn Android development why should you learn Java first?

Because Android development is based on this platform. For example, a dwelling, a living room, bedroom, balcony and so on, but each piece of brick accumulated. This brick is Java, so we should learn the Java language well and be familiar with the relevant platform.

Third, Java development tools

The Java language tries to ensure that there are more than 1G in the system, and the other tools are as follows:

• Linux system or Windows 95/98/2000/xp,win 7/8 system
• Java JDK 7 (Java Development Package, the code we write runs on this platform)
• Ide:eclipse (development tools to help us write code)

After installing the above tools, we can output the first Java program "Hello world! "

public class  Helloworld { public Span class= "KWD" >static void Main (string []args)  { system.. Println "Hello World" }}          /span>                

0 Fundamentals of Android Development Java language Learning 01-What is Java