Java入门基础：linux centos下安装和配置jdk8

1、下载JDK8

https://www.oracle.com/technetwork/java/javase/downloads/jdk8-downloads-2133151.html

2、使用FileZilla将文件上传到服务器：

3、解压安装包

tar -zxvf jdk-8u231-linux-arm64-vfp-hflt.tar.gz

4、创建文件夹：

mkdir /usr/local/java

5、将解压的Java安装程序复制到文件夹中

mv jdk1.8.0_231/* /usr/local/java

6、打开/etc/profile配置文件

vi /etc/profile

加入如下配置内容

export JAVA_HOME=/usr/local/java

export CLASSPATH=.:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar

export PATH=$PATH:$JAVA_HOME/bin

7、使配置文件生效

source /etc/profile

8、执行java命令验证是否安装成功：

[root@ecs-1d4d java]# java

Usage: java [-options] class [args...]

           (to execute a class)

   or  java [-options] -jar jarfile [args...]

           (to execute a jar file)

where options include:

    -d32          use a 32-bit data model if available

    -d64          use a 64-bit data model if available

    -server       to select the "server" VM

                  The default VM is server,

                  because you are running on a server-class machine.