linux 安装JDK

1.mkdir /usr/java

2.tar -xzvf jdk-8u201-linux-x64.tar.gz

3.vi /etc/profile

JAVA_HOME=/usr/java/jdk1.8.0_201

PATH=$JAVA_HOME/bin:$PATH

CLASSPATH=.:$JAVA_HOME/lib/tools.jar

export PATH JAVA_HOME CLASSPATH

4.source /etc/profile

5.java -version