Jdk

https://www.oracle.com/java/technologies/javase/javase-jdk8-downloads.html
# 解压
sudo tar xzvf jdk-8u301-linux-x64.tar.gz -C /usr/local/lib/
# 查看
 ll /usr/local/lib/
# 修改权限
sudo chown root:root -R jdk1.8.0_301/
sudo vi /etc/profile  
# 最下面添加如下内容
export JAVA_HOME=/usr/local/lib/jdk1.8.0_301
export JRE_HOME=$JAVA_HOME/jre
export CLASSPATH=.:$JAVA_HOME/lib:$JRE_HOME/lib
export PATH=$JAVA_HOME/bin:$JRE_HOME/bin:$PATH
# 使配置生效
source /etc/profile

java -version

eclipes

https://www.eclipse.org/downloads/download.php?file=/oomph/epp/2021-06/R/eclipse-inst-jre-linux64.tar.gz
# 解压eclipse到/opt文件夹下，指令为：
sudo tar zxvf eclipse-inst-linux64.tar.gz -C /opt/
cd /usr/share/applications  && sudo vim eclipse.desktop

[Desktop Entry]
Encoding=UTF-8
Name=Eclipse
Comment=Eclipse
Exec=/opt/eclipse-installer/eclipse-inst
Icon=/opt/eclipse-installer/icon.xpm
Terminal=false
StartupNotify=true
Type=Application
Categories=Application;Development;

# 将eclipse变为可执行文件  
sudo chmod u+x eclipse.desktop