<< the 1th chapter of the first knowledge java>>

A collection of ordered instructions written to allow a computer to perform certain operations or solve a problem.

Steps to develop Java programs: (1) Writer program (2) compile (3) run

Structure of the Java program: (1) write a framework for the program, such as public class helloword{} (2) to write a frame of the main () method, such as public static void Main (string[] args{}

A program can have only the main () method. (3) writing code

Java Program Comments: (1) Single-line comments, using//Start (2) multiline comments, with "/*" beginning with "*/" end.

java Coding Specification: (1) encoding must be decorated with public. (2) A single statement is written on one line. (3) The portion enclosed in {} usually represents a hierarchy of the program, "{" is generally placed at the bottom of the beginning line of the structure, "}" is aligned with the first line of the structure and takes a separate line. (4) A lower level of the statement or comment should be more than a level of statements or comments indented a number of spaces before writing, so that the program clearer, increase the readability of the program.

Java is primarily used to develop two types of programs: desktop applications and intrenet applications.

Program development There is a law, that "must be wrong" * * *

Common error: (1) class can not be arbitrarily named (2) void (3) Java for the English letter case sensitivity (4) ";" is required (5) "" "is required

<< the 1th chapter of the first knowledge java>>