下载jdk18
Java Archive Downloads - Java SE 18
安装
sudo su
sudo apt install /home/kali/Downloads/jdk-18.0.1.1_linux-x64_bin.deb
cd /usr/lib/jvm/
ll
sh -c 'for bin in /usr/lib/jvm/jdk-18/bin/*; do update-alternatives --install /usr/bin/$(basename $bin) $(basename $bin) $bin 100; done'
sh -c 'for bin in /usr/lib/jvm/jdk-18/bin/*; do update-alternatives --set $(basename $bin) $bin; done'
update-alternatives --display java
vim /etc/profile
添加
export JAVA_HOME=/usr/lib/jvm/jdk-18
export JRE_HOME=${JAVA_HOME}/jre
export CLASSPATH=.:${JAVA_HOME}/lib:${JRE_HOME}/lib
export PATH=${JAVA_HOME}/bin:$PATH
source /etc/profile
java --version
