传压缩包
sudo mkdir /usr/lib/jvm
sudo tar -zxvf jdk-11.0.15.1_linux-x64_bin.tar.gz -C /usr/lib/jvm
sudo vi ~/.bashrc
加入
export JAVA_HOME=/usr/lib/jvm/jdk-11.0.15.1// 这里要注意目录要换成自己解压的jdk 目录
export JRE_HOME={JAVA_HOME}/lib:{JAVA_HOME}/bin:$PATH
source ~/.bashrc
sudo update-alternatives --install /usr/bin/java java /usr/lib/jvm/jdk-11.0.15.1/bin/java 300
java -version
find / -name keytool
export PATH=/usr/lib/jvm/jdk-11.0.15.1/bin/:$PATH
