Javase Basic Primer Review Notes

Software is divided into system software Windows Linux Class (Unix) Mac (Macintosh), database management system

UNIX Linux Open source OS (open source) free open

OS operation system

iOS (iphone operation system)

ISO System image file

Application software: Qq.exe

Graphical interface interaction (GUI graphic user interface) command line interaction (CLI command Lines interface)

Dos

Suffix Name: Doc docx (XML Extensibility Markup Language) XLS xlsx ppt pptx bat batch file suffix

CD Switch directory MD create directory dir column directory ls delete delete file

CD \ Back to root directory

CD: Go up First level directory

Remove Removal directory

D Directory MD make

Clear CLS Clear Screen

Exit to leave the cmd window

Classification of computer languages

The development of language:

Machine language: 1012 binary 100000 Add assembly language: Add Simple English mnemonic sub computer can not be directly recognized, the final need to translate into machine-recognized machine language, top real! Advanced Language: C + + java C # vb

The. NET platform can do a lot of things on this platform

Use C # primarily

Java is a language but it's also a platform

ECLR---Development process for a set of languages edit Compilie (compile) L link R run

Compiler language (c) explanatory language (no compilation required, direct-to-run language HTML JavaScript) semi-compiled semi-explanatory VB Java

The Java language of past life

Overview of the Java language

Java Coffee

2010 Years of Sun's company was acquired by Oracle. 7.4 billion dollars. Microsoft Lenovo Oracle Sun IBM Java The first language to incorporate internet factors

Java Three technical architecture Java SE Standard Edition Java edition Java Enterprise Edition Java-me mini version of Java Micro Edition used in small In the embedded development embed

The Java language Cross-platform: the platform operating system Java language is cross-platform, but the JVM is not cross-platform .....

JDK Java Development Kit Java Development Component Package JRE Java running Environment Java run environment JVM Java Virtual machine java VM

Jdk--jre--written by JVM C (the Java language is run on the JVM)

Java 1.4 1.5 (5.0) There are a lot of new features enumerated generic variadic enhancement for loop 1.7 (7.0)

<meta name= "Language" content= "ZH-CN"/><meta name= "Language" content= "en" >

Path

D:\oracle\product\10.2.0\db_1\bin;%xprog%\nvidia Corporation\physx\common;%xprog%\intel\icls Client\; C:\Program Files\intel\icls client\; C:\Program files\broadcom\broadcom 802.11 Network adapter\driver;; %systemroot%\system32;%systemroot%;%systemroot%\system32\wbem;%systemroot%\system32\windowspowershell\v1.0\; C:\Program Files\intel\intel (R) Management Engine components\dal; C:\Program Files\intel\intel (R) Management engine Components\ipt;%xprog%\intel\intel (r) Management engine components\ Dal;%xprog%\intel\intel (R) Management Engine components\ipt;d:\tomcat 6.0\bin; C:\Program files\java\jdk1.7.0_45\bin;d:\adt-bundle-windows-x86_64-20131030\sdk\platform-tools;d:\quicktime\ Qtsystem\;%xprog%\mysql\mysql Server 5.5\bin;d:\mysql\bin;%xprog%\microsoft Visual Studio 9.0\common7\ide\ Privateassemblies\;D: \sqlse rver\x86\100\dts\binn\; C:\Program Files (x86) \microsoft SQL server\100\tools\binn\; C:\Program Files\Microsoft SQL Server\100\tools\binn\; C:\Program Files\Microsoft SQL Server\100\dts\binn\; C:\Program Files (x86) \microsoft SQL Server\100\tools\binn\vsshell\common7\ide\; C:\Program Files (x86) \microsoft Visual Studio 9.0\common7\ide\privateassemblies\; C:\Program Files (x86) \microsoft SQL server\100\dts\binn\

%SystemRoot%\System32

The bin directory has two commands Java running bytecode files. class bytecode Javac compiling Java files

Javase Basic Primer Review Notes