linux安装jdk

1.去Oracle官网下载linux版jdk

https://www.oracle.com/java/technologies/javase-downloads.htm

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2.使用SecureFX上传jdk

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3.解压jdk

tar -zxvf jdk-8u271-linux-x64.tar.gz -C /usr/local/
mv /usr/local/jdk1.8.0_271 /usr/local/java

4.配置java环境

1.进入配置文件

vi /ect/profile

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2.在配置文件里加

export JAVA_HOME=/usr/local/java
export CLASSPATH=.:${JAVA_HOME}/lib/dt.jar:${JAVA_HOME}/lib/tool.jar

export PATH=${JAVA_HOME}/bin:$PATH

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3.使环境变量生效

source /etc/profile 

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5.查看jdk是否配置成功

java –version

出现了这段代码就说明成功了!