Chapter one developing a simple Java application

1. What is a program?

The word of procedure originates from life, and the popular point is to write the things of life in a program.

and execute.

2. Why learn Java?

Java is a high-level programming language introduced by Sun Microsystems in 1995

Javase,javaee,javame with the development of mature

Javase: Developing and deploying on the desktop

Java EE: Enterprise version helps develop programs and more

Javame:java ME for on mobile devices and embedded devices

3. How should the development process proceed?

Divided into three steps to go:

1. Writing the source program 2. Compiling the source program 3. Last Run

4.Java Program Framework:

public class Helloyuntun(file name){

public static void Main (string[] args) {main entry

Writing code

}

}

construction project : File->new->java project-> Name

Gca

public class Helloyuntu {

public static void Main (string[] args) {

SYSTEM.OUT.PRINTLN ("Hello! Cloud Intelligence "); } }

This is a simple to create Java program

5. Common symbols:

\ n: line break, before and after

\ t: tab stop, alignment action, pre-and mid-

Add comment : Multi-line /*

*/

single-line //

Chapter one developing a simple Java application