JDK windows和linux安装
JDK在windows和linux下的安装
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
![](https://images2015.cnblogs.com/blog/1108409/201704/1108409-20170401154623883-1350677196.png)
2. 配置环境变量
- 计算机属性---高级--环境变量
![](https://images2015.cnblogs.com/blog/1108409/201704/1108409-20170401154624195-2014734037.png)
JAVA_HOME
C:\Program Files\Java\jdk1.8.0_121
CLASSPATH
.;%JAVA_HOME%\lib\dt.jar;%JAVA_HOME%\lib\tools.jar
Path
%JAVA_HOME%\bin;%JAVA_HOME%\jre\bin
![](https://images2015.cnblogs.com/blog/1108409/201704/1108409-20170401154624852-1341093604.png)
3、环境监测
- C:\Users\Jesper>java
- C:\Users\Jesper>javac
二、linux安装
1、下载jdk安装包
![](https://images2015.cnblogs.com/blog/1108409/201704/1108409-20170401154625367-316532563.png)
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=$JAVA_BIN:$PATHsource ~/.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