配置java环境

Objective
Install Java 2 SDK, Standard Edition, and configure the “Path” and “Classpath” properties of operating systems to run ‘java’, ‘javac’ and other j2sdk commands correctly in console windows.

Directions
1、Install java 2 SDK, Standard Edition

 

 

 

 

 

 

 

 

 

 

as default options

the installation directory is as follow：

2、configure the Path and Classpath properties of OS with two methods

A. configuration method：

start->configure->control panel ->system->advance->environment variables

Edit Path property:

Add at the beginning of the value row “C:\jdk1.3.1\jre\bin;C:\jdk1.3.1\bin;”

create or edit classpath property：

 

Add at the beginning of the value row “.;C:\jdk1.3.1\jre\lib \rt.jar;C:\jdk1.3.1\jre\lib;C:\jdk1.3.1\lib;”

choose ok.

B. configure method:

create bat file and run it in console windows before using j2sdk tools, set131.bat as example。

the set131.bat file:

set PATH=C:\jdk1.3.1\jre\bin;C:\jdk1.3.1\bin;%PATH%

set CLASSPATH=.;C:\jdk1.3.1\jre\lib\rt.jar;C:\jdk1.3.1\jre\lib;C:\jdk1.3.1\lib;%CLASSPATH%

 

Testing
in windows2000/xp/2003 operating systems: start->run：enter ’cmd’ command and choose Ok：

enter ‘java’ and return ：

enter ‘javac’ and return ：

 

running the simple program in the directory “examples”

the commands as follow：

cd D:\java\lab\lab1\examples

 

 

 

 

 

 

javac Welcome.java              （compile the java file）

java Welcome                                （run the class file）