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1.首先去oracle官网:
http://www.oracle.com/technetwork/java/javase/downloads/jdk8-downloads-2133151.html
![ubuntu18.04一步步安装jdk1.8插图1 ubuntu18.04一步步安装jdk1.8](https://yundeesoft.com/wp-content/uploads/2022/11/2022112316405970.jpg)
2.下载linux 64位 jdk-8u171-linux-x64.tar.gz 包(版本自己选择,jdk已经更新到10了)
![ubuntu18.04一步步安装jdk1.8插图3 ubuntu18.04一步步安装jdk1.8](https://yundeesoft.com/wp-content/uploads/2022/11/2022112316405970.jpg)
3.解压 tar xvf jdk-8u171-linux-x64.tar.gz
![ubuntu18.04一步步安装jdk1.8插图5 ubuntu18.04一步步安装jdk1.8](https://yundeesoft.com/wp-content/uploads/2022/11/2022112316405970.jpg)
4.解压完成后查看
![ubuntu18.04一步步安装jdk1.8插图7 ubuntu18.04一步步安装jdk1.8](https://yundeesoft.com/wp-content/uploads/2022/11/2022112316405970.jpg)
我们准备把软件安装到/usr/local/ jdk1.8.0_171目录下
5.把上面解压好的jdk1.8.0_171目录移动到/usr/local/下
![ubuntu18.04一步步安装jdk1.8插图9 ubuntu18.04一步步安装jdk1.8](https://yundeesoft.com/wp-content/uploads/2022/11/2022112316405970.jpg)
6.查看/usr/local目录下
![ubuntu18.04一步步安装jdk1.8插图11 ubuntu18.04一步步安装jdk1.8](https://yundeesoft.com/wp-content/uploads/2022/11/2022112316405970.jpg)
7.进入cd /etc
![ubuntu18.04一步步安装jdk1.8插图13 ubuntu18.04一步步安装jdk1.8](https://yundeesoft.com/wp-content/uploads/2022/11/2022112316405970.jpg)
8.执行vi profile
![ubuntu18.04一步步安装jdk1.8插图15 ubuntu18.04一步步安装jdk1.8](https://yundeesoft.com/wp-content/uploads/2022/11/2022112316405970.jpg)
9.进行vi编辑下
export JAVA_HOME=/usr/local/jdk1.8.0_171
export JRE_HOME=/usr/local/jdk1.8.0_171/jre
export PATH=$PATH:/usr/local/jdk1.8.0_171/bin
export CLASSPATH=./:/usr/local/jdk1.8.0_171/lib:/usr/local/jdk1.8.0_171/jre/lib
![ubuntu18.04一步步安装jdk1.8插图17 ubuntu18.04一步步安装jdk1.8](https://yundeesoft.com/wp-content/uploads/2022/11/2022112316405970.jpg)
10.wq!后,重启ubuntu
输入java -version进行测试
![ubuntu18.04一步步安装jdk1.8插图19 ubuntu18.04一步步安装jdk1.8](https://yundeesoft.com/wp-content/uploads/2022/11/2022112316405970.jpg)
安装完成,全程自己一步步截图,下载jdk安装包需要oracle账号,怕麻烦的小伙伴也可以私信我获取jdk安装包;
下面的文章继续发如何安装tomcat8和idea等软件的教程
![ubuntu18.04一步步安装jdk1.8插图21 ubuntu18.04一步步安装jdk1.8](https://yundeesoft.com/wp-content/uploads/2022/11/2022112316405970.jpg)
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