ubuntu 下jdk安装配置

时间:2023-02-04 06:31:55
  • 下载jdk-8u71-linux-x64.tar.gz

  • 创建jvm文件夹(/usr/lib/jvm)

sudo mkdir /usr/lib/jvm
  • 创建jvm文件夹(/usr/lib/jvm)

sudo tar zxvf jdk-8u71-linux-x64.tar.gz  -C /usr/lib/jvm
  • 设置环境变量(全局)

sudo gedit  /etc/profile

打开profile文件输入

    export JAVA_HOME=/usr/lib/jvm/jdk1.8.0_71 
export CLASSPATH
=".:$JAVA_HOME/lib:$CLASSPATH"
export PATH
="$JAVA_HOME/bin:$PATH"
  • 设置系统默认JDK

    sudo update-alternatives --install /usr/bin/java java /usr/lib/jvm/jdk1.8.0_71/bin/java 300  
sudo update
-alternatives --install /usr/bin/javac javac /usr/lib/jvm/jdk1.8.0_71/bin/javac 300
sudo update
-alternatives --config java
  • 验证JDK

java -version