1. 首先,去官网下载最新的JDK,网址:http://www.oracle.com/technetwork/java/javase/downloads/jdk8-downloads-2133151.html

  2. 将jdk-8u91-linux-x64.tar.gz解压

    usr@usr-VirtualBox:~$ tar xzf ~/下载/jdk-8u91-linux-x64.tar.gz

  3. 将解压的文件夹移动到/opt/目录下

    usr@usr-VirtualBox:~$ sudo mv ./jdk1.8.0_91 /opt/

  4. 配置java环境,在家目录下的.bashrc中,添加export PATH=$PATH:/opt/jdk1.8.0_91/bin

    usr@usr-VirtualBox:~$  vi ~/.bashrc

    添加

        export PATH=$PATH:/opt/jdk1.8/bin

    5. 成功

            usr@usr-VirtualBox:~$ javac -version
            javac 1.8.0_91