配置 JDK13

下载jdk13 https://www.oracle.com/java/technologies/javase-downloads.html

#创建java文件夹
mkdir /usr/local/java

#解压到 /usr/local/java
tar -zxvf jdk-13.0.1_linux-x64_bin.tar.gz -C /usr/local/java

#编辑 /etc/profile 
vi /etc/profile

export JAVA_HOME=/usr/local/java/jdk-13.0.1
export JRE_HOME=/${JAVA_HOME}
export CLASSPATH=.:${JAVA_HOME}/libss:${JRE_HOME}/lib
export PATH=${JAVA_HOME}/bin:$PATH

#生效
source /etc/profile

java -version