Ubuntu系统安装配置JDK

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1，官网下载Linux版本的JDK，选择tar.gz

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

2，下载到本地之后，解压：

gunzip jdk1.8.0_112.tar.gz

tar -zxvf jdk1.8.0_112.tar

3, 创建存放jdk的文件夹sudo mkdir /usr/local/java

4, 把解压后的JDK文件复制到/usr/local/java中

5，配置环境变量vim /etc/profile

# /etc/profile: system-wide .profile file for the Bourne shell (sh(1))
# and Bourne compatible shells (bash(1), ksh(1), ash(1), ...).
#set java environment

export JAVA_HOME=/usr/local/java/jdk1.8.0_112

export JRE_HOME=/usr/local/java/jdk1.8.0_112/jre

export CLASSPATH=.:$JAVA_HOME/lib:$JRE_HOME/lib:$CLASSPATH

export PATH=$JAVA_HOME/bin:$JRE_HOME/bin:$JAVA_HOME:$PATH

6，source profile

7，测试是否配置成功java -version

参考文章：

http://blog.csdn.net/jiangwei0910410003/article/details/37996723

http://www.linuxidc.com/Linux/2016-04/130438.htm

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