1 下載對應版本的安裝包

2 解壓後複製到 usr/lib/jvm/目錄下

tar -xzvf jdk-8u131-linux-i586.gz

sudo mv jdk1.8.0_131 /usr/lib/jvm/jdk1.8.0_131

3 更新jdk

sudo update-alternatives --install /usr/bin/java java /usr/lib/jvm/jdk1.8.0_131/bin/java 1

sudo update-alternatives --install /usr/bin/javac javac /usr/lib/jvm/jdk1.8.0_131/bin/javac 1

sudo update-alternatives --config java
 

sudo update-alternatives --config javac

$echo $JAVA_HOME

/usr/lib/jvm/java-7-openjdk-i386

$ sudo echo export JAVA_HOME="/usr/lib/jvm/jdk1.8.0_131/" >> ~/.bashrc

$source ~/.bashrc

$echo $JAVA_HOME

$source /etc/profile