JDK 环境搭建

#最新版本下载 http://www.oracle.com/technetwork/java/javase/downloads/index.html #旧版本下载 http://www.oracle.

 

#最新版本下载

http://www.oracle.com/technetwork/java/javase/downloads/index.html

#旧版本下载

http://www.oracle.com/technetwork/java/javase/archive-139210.html

 

 

#下载 JDK 上传 jdk-8u101-linux-x64.tar.gz

chmod 755 jdk-8u101-linux-x64.tar.gz

tar xzvf jdk-8u101-linux-x64.tar.gz

chown -R root:root ./jdk1.8.0_101

mkdir /usr/java

mv ./jdk1.8.0_101/ /usr/java/

cd /usr/java/

ln -s ./jdk1.8.0_101 ./latest

ln -s ./latest ./default

 

#全局

vim /etc/profile

 

#用户变量

vim ~/.bashrc

# set JAVA_HOMEexport JAVA_HOME="/usr/java/default"export CLASS_PATH="${JAVA_HOME}/lib/dt.jar;${JAVA_HOME}/lib/tools.jar"export PATH=${PATH}:${JAVA_HOME}/bin

source /etc/profile

java -version

java version "1.8.0_101"Java(TM) SE Runtime Environment (build 1.8.0_101-b13)Java HotSpot(TM) 64-Bit Server VM (build 25.101-b13, mixed mode)

#更换版本方式

rm -rf ./latest

sudo ln -s ./new_jdk ./latest

source /etc/profile