linux安装JDK

1.下载jdk

Java Downloads | Oracle

2.解压

tar -xzvf jdk-8u202-linux-x64.tar.gz

3.编辑profile

vi /etc/profile

4.在底部添加

export JAVA_HOME=/usr/local/software/jdk/jdk1.8.0_202
export JRE_HOME=$JAVA_HOME
export PATH=$PATH:$JAVA_HOME/bin:$JRE_HOME/bin
export CLASSPATH=.:$JAVA_JOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar:$JRE_HOME/lib

5.执行命令让profile生效

source /etc/profile

6.验证 java -version