Linux下openjdk11环境变量配置
安装步骤
1、查看当前Linux系统是否安装java
rpm -qa | grep java
2、卸载系统中已经存在的openJDK
rpm -e --nodeps java-1.7.0-openjdk-1.7.0.171-2.6.13.2.el7.x86_64
rpm -e --nodeps java-1.8.0-openjdk-1.8.0.161-2.b14.el7.x86_64
3、上传JDK到Linux系统
4、在/usr/local目录下创建java目录
cd /usr/local/
mkdir java
5、解压jdk
tar -zxvf openjdk-11_linux-x64_bin.tar.gz -C /usr/local/java/
6、配置Jdk环境变量
vim /etc/profile
#set java environment
JAVA_HOME=/usr/local/java/jdk11
CLASSPATH=.:$JAVA_HOME/lib
PATH=$PATH:$JAVA_HOME/bin
export JAVA_HOME CLASSPATH PATH
7、重新加载/etc/profile文件，让配置生效
source /etc/profile
8、测试安装是否成功
java -version
显示
[root@localhost mysoft]# java -version
java version "1.8.0_161"
Java(TM) SE Runtime Environment (build 1.8.0_161-b12)
Java HotSpot(TM) 64-Bit Server VM (build 25.161-b12, mixed mode)
