JDK windows和linux安装

JDK在windows和linux下的安装

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一、window安装

1. 安装

• 一直下一步安装。
• 默认c盘，jdk 和 jre都在c盘

       

 

2. 配置环境变量

• 计算机属性---高级--环境变量

            

 

 

JAVA_HOME
C:Program FilesJavajdk1.8.0_121

CLASSPATH
.;%JAVA_HOME%libdt.jar;%JAVA_HOME%lib	ools.jar

Path
%JAVA_HOME%in;%JAVA_HOME%jrein

 

 　　 

 

3、环境监测

• C:UsersJesper>java
• C:UsersJesper>javac

 

 

二、linux安装

1、下载jdk安装包

          http://www.oracle.com/technetwork/java/javase/downloads/jdk8-downloads-2133151.html

         

 

2、卸载旧版本

 

 

[root@ser1 ~]# java -version
java version "1.7.0_45"
OpenJDKRuntimeEnvironment(rhel-2.4.3.3.el6-x86_64 u45-b15)
OpenJDK64-BitServer VM (build 24.45-b08, mixed mode)

[root@ser1 ~]# rpm -qa |grep java
tzdata-java-2013g-1.el6.noarch
java-1.7.0-openjdk-1.7.0.45-2.4.3.3.el6.x86_64
java-1.6.0-openjdk-1.6.0.0-1.66.1.13.0.el6.x86_64
tzdata-java-2013g-1.el6.noarch

3、安装新版本

tar -xf jdk-8u121-linux-x64.tar.gz 
mv jdk1.8.0_121/ /usr/local/
cd /usr/local/jdk1.8.0_121/

[root@ser1 jdk1.8.0_121]# ll
total 25924
drwxr-xr-x 2 uucp 143     4096Dec1308:47 bin // bin目录
-r--r--r--1 uucp 143     3244Dec1308:46 COPYRIGHT
drwxr-xr-x 4 uucp 143     4096Dec1308:46 db
drwxr-xr-x 3 uucp 143     4096Dec1308:46 include
-rwxr-xr-x 1 uucp 143  5094116Dec1304:10 javafx-src.zip
drwxr-xr-x 5 uucp 143     4096Dec1308:46 jre
drwxr-xr-x 5 uucp 143     4096Dec1308:47 lib //lib目录
-r--r--r--1 uucp 143       40Dec1308:46 LICENSE
drwxr-xr-x 4 uucp 143     4096Dec1308:46 man
-r--r--r--1 uucp 143      159Dec1308:46 README.html
-rw-r--r--1 uucp 143      526Dec1308:46 release
-rw-r--r--1 uucp 14321116095Dec1308:46 src.zip
-rwxr-xr-x 1 uucp 143   110114Dec1304:10 THIRDPARTYLICENSEREADME-JAVAFX.txt
-r--r--r--1 uucp 143   177094Dec1308:46 THIRDPARTYLICENSEREADME.txt

4、jdk环境变量配置

vim ~/.bashrc

[root@ser1 jdk1.8.0_121]# cat ~/.bashrc  |egrep -A10 jdk
#djk
exportexport JAVA_HOME=/usr/local/jdk1.8.0_121
export JAVA_BIN=$JAVA_HOME/bin
export JAVA_LIB=$JAVA_HOME/lib
export CLASSPATH=.:$JAVA_LIB/tools.jar:$JAVA_LIB/dt.jar
export PATH=$JAVA_BIN:$PATH

source ~/.bashrc 

5、检验jdk安装

[root@ser1 jdk1.8.0_121]# java -version
java version "1.8.0_121"
Java(TM) SE RuntimeEnvironment(build 1.8.0_121-b13)
JavaHotSpot(TM)64-BitServer VM (build 25.121-b13, mixed mode)

[root@ser1 jdk1.8.0_121]# javac -version
javac 1.8.0_121