linux配置ubuntu

配置：

 

tar zxvf jdk-8u65-linux-x64.gz  -C /usr/lib/jvm

vim /etc/profile

export JAVA_HOME=/usr/lib/jvm/jdk1.8.0_65  
export CLASSPATH=".:$JAVA_HOME/lib:$CLASSPATH"  
export PATH="$JAVA_HOME/bin:$PATH"


sudo update-alternatives --install /usr/bin/java java /usr/lib/jvm/jdk1.8.0_65/bin/java 300  
sudo update-alternatives --install /usr/bin/javac javac /usr/lib/jvm/jdk1.8.0_65/bin/javac 300  
sudo update-alternatives --config java 

 

 

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