Ubuntu18.04 配置Java Jdk1.8環境
1.下載(需要登錄) Java Jdk
2.創建Java目錄:$ sudo mkdir /usr/local/java
3.解壓下載的Jdk文件到指定位置:$ sudo tar zxvf jdk-8u231-linux-x64.tar.gz -C /usr/local/java
4.爲Jdk文件創建一個同步鏈接:$ sudo ln -s /usr/local/java/jdk1.8.0_151/ /usr/local/java/latest
5.修改系統環境變量:sudo gedit /etc/environment
在下面加入:
export JAVA_HOME=/usr/local/java/latest
export JRE_HOME=/usr/local/java/latest/jre
export CLASSPATH=$CLASSPATH:$JAVA_HOME/lib:$JAVA_HOME/jre/lib
6.修改用戶環境變量:$ sudo gedit /etc/profile
在下面加入:
export JAVA_HOME=/usr/local/java/latest
export JRE_HOME=/usr/local/java/latest/jre
export CLASSPATH=$CLASSPATH:$JAVA_HOME/lib:$JAVA_HOME/jre/lib
export PATH=$JAVA_HOME/bin:$JAVA_HOME/jre/bin:$PATH:$HOME/bin
7.更新一下文件:$ source /etc/profile
8.查看Java版本:$ java -version