如何在linux下安装jdk

tar -zxvf jdk-11.0.4_linux-x64_bin.tar.gz
mkdir -p /usr/local/jdk/
mv jdk-11.0.4 /usr/local/jdk/

vi /etc/profile
export JAVA_HOME=/usr/local/jdk/jdk-11.0.4
export PATH=$JAVA_HOME/bin:$PATH
export CLASSPATH=.:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib

source /etc/profile