1. javase-computer Principles and Java Introduction

Basic concepts

Software: A collection of computer data and instructions organized in a specific order

Common software: System software (DOS,Windows,Linux), application software (Thunderbolt, etc.)

Development: The process of making software is called development

Human-Computer Interaction: The advent of software to achieve a good graphical interface of human-computer interaction, command line mode (direct input instructions)

Language: A way for people to communicate with each other

Computer language: The way people communicate with computers (c,C + +,Java,Python , etc.)

Java Language Overview:

SUN1995 is a high-level programming language introduced in the year, the object-oriented Internet programming language,Java Technology Web direction also day

Mature, easy to learn, fully object-oriented, cross-platform

Java Three technical architectures:

Java 2 Platform Enterprise Edition : A set of solutions for applications in enterprise environments

j2se (Java 2 Platform standard Edition): A solution for developing common desktop and business applications

J2ME (Java 2 Platform micro Edition) Small edition : solutions for developing electronic products and embedded devices

JRE(Java Runtime Environment):

java Runtime environment, including java virtual machines and java core class libraries

JDK(Java development Kit):

Java Development Kit , which contains Java development tools and JRE, so install the jdk c10> will not need to install the JRE.

Development tools include the build tool (javac exe) packaging tool (jar EXE), etc.

DOS common command line:

MD New Directory

Dir lists the files in the directory

CD Switch Directory

Cd\ back to the root directory of the current disk

del Delete file

Exit dos command line

Rd Delete Empty folders

Use Help

Java Program development Three-step walk:

The first step: Edit Java code to save as a . java suffix file

Step two: Compile the Java file with the javac command

Step three: Execute the . class file with the java command

This article is from the "Keyman" blog, make sure to keep this source http://keyman.blog.51cto.com/9807984/1676450

1. javase-computer Principles and Java Introduction