安装
1 创建文件夹
mkdir java
2 下载JDK
JDK 下载地址http://www.oracle.com/technetwork/java/javase/downloads/jdk8-downloads-2133151.html
wget --no-check-certificate --no-cookies --header "Cookie: oraclelicense=accept-securebackup-cookie" http://download.oracle.com/otn-pub/java/jdk/8u144-b01/090f390dda5b47b9b721c7dfaa008135/jdk-8u144-linux-x64.tar.gz
3 解压
tar -zxvf jdk-8u144-linux-x64.tar.gz
4 配置环境变量
- 编辑配置文件
sudo vim ~/.bash_profile
- 输入以下内容
export JAVA_HOME=/home/ubuntu/java/jdk1.8.0_144
export JRE_HOME=${JAVA_HOME}/jre
export CLASSPATH=.:${JAVA_HOME}/lib:${JRE_HOME}/lib
export PATH=${JAVA_HOME}/bin:$PATH
- 使配置生效
source ~/.bash_profile
5 检查是否配置正确
java -version
- 出现以下内容：
Java(TM) SE Runtime Environment (build 1.8.0_144-b01)
Java HotSpot(TM) 64-Bit Server VM (build 25.144-b01, mixed mode)
ubuntu@local:~/java/jdk1.8.0_144$
6 查看JDK的路径
whereis java
which java （java执行路径）
echo $JAVA_HOME
echo $PATH