linux 安装jdk

sudo mkdir -p /usr/local/lib/jdk/jdk11
sudo tar -zxvf jdk-11.0.15_linux-x64_bin.tar.gz  -C /usr/local/lib/jdk/jdk11/

sudo vim /etc/profile

尾部添加:
	export JAVA_HOME=解压位置(/usr/local/lib/jdk/jdk11/jdk-11.0.15)
	export CLASSPATH=.:${JAVA_HOME}/lib
	export PATH=${JAVA_HOME}/bin:$PATH

java
javac
java -version