Jdk1.8.0_121.md

linux源码安装jdk

1:下载安装(所有)

http://www.oracle.com/technetwork/java/javase/archive-139210.html
use: jdk-8u121-linux-x64.tar.gz

2:解压移动

tar zxvf jdk-8u121-linux-x64.tar.gz
cp -R jdk1.8.0_121/ /usr/local
或
tar zxvf jdk-8u121-linux-x64.tar.gz -C /usr/local/

3:修改环境变量

vim /etc/profile
#最后加入
#JDK
export JAVA_HOME=/usr/local/jdk1.8.0_121
export CLASSPATH=$JAVA_HOME/lib:.
export PATH=$JAVA_HOME/bin:$PATH
#生效
source /etc/profile

4:检查安装

java -version
java version "1.8.0_121"
Java(TM) SE Runtime Environment (build 1.8.0_121-b13)
Java HotSpot(TM) 64-Bit Server VM (build 25.121-b13, mixed mode)
也可同时执行java和javac再此检查！

注：ubuntu系统每次登录，需要手动生效，自动生效:
可在用户目录下的.profile中最后加入:
source /etc/profile