kali 安装java jdk

先卸载原有java版本

kali自带的java版本为 Openjdk

sudo apt-get remove openjdk*

卸载不需要的java软件

sudo apt autoremove

解压到/opt文件夹

tar -zxvf jdk-8u241-linux-x64.tar_060badc66d950764f844.gz 

设置环境变量

vim /etc/profile

#JAVA JDK
export JAVA_HOME=/opt/jdk1.8.0_241
export CLASSPATH=.:${JAVA_HOME}/lib
export PATH=${JAVA_HOME}/bin:$PATH 

source /etc/profile

依次执行命令

update-alternatives --install /usr/bin/java java /opt/jdk1.8.0_241/bin/java 1
update-alternatives --install /usr/bin/javac javac /opt/jdk1.8.0_241/bin/javac 1
update-alternatives --set java /opt/jdk1.8.0_241/bin/java
update-alternatives --set javac /opt/jdk1.8.0_241/bin/javac

查询结果

java -version

参考：
https://blog.csdn.net/dhait/article/details/111083963