ubuntu server 20.04.3之安装java

ubuntu server 20.04.3之安装java 1.获取java安装包

jdk-11.0.12_linux-x64_bin.tar.gz

2.安装

sudo mkdir /usr/local/mysoftware

sudo tar zxvf jdk-11.0.12_linux-x64_bin.tar.gz -C /usr/local/mysoftware

3.配置环境变量

sudo vim /etc/profile

在文件最后添加下列内容：

export JAVA_HOME=/usr/local/mysoftware/jdk-11.0.12
export JAVA_BIN=$JAVA_HOME/bin
export JAVA_LIB=$JAVA_HOME/lib
export CLASSPATH=.:$JAVA_LIB/tools.jar:$JAVA_LIB/dt.jar
export PATH=$JAVA_BIN:$PATH

4.重启配置

source /etc/profile

5.检查是否安装完成

java -version