CentOS7安装JDK1.8

1、解压

tar -zxvf jdk-8u251-linux-x64.tar.gz

mkdir /usr/local/java

mv jdk1.8.0_251 /usr/local/java/

2、编辑环境变量

vim /etc/profile

export JAVA_HOME=/usr/local/java/jdk1.8.0_251
export CLASSPATH=.:$JAVA_HOME/lib/rt.jar
export PATH=$PATH:$JAVA_HOME/bin

3、生效环境变量

source /etc/profile

4、验证

java -version

javac

javap