linux安装JDK1.8

CentOS7下JDK1.8安装指南

最新推荐文章于 2025-10-02 17:43:17 发布

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本文详细介绍了在CentOS7系统中安装JDK1.8的步骤，包括从Oracle官网下载JDK，解压并配置环境变量，最后验证安装是否成功。适合初次接触Linux系统JDK安装的读者。

linux安装JDK1.8

cnetos7安装JDK1.8

下载 jdk下载地址官网 https://www.oracle.com/technetwork/java/javase/downloads/index.html，
我的jdk是jdk-8u11-linux-x64版本，把jdk放在自己喜欢的地方，我的放在以下目录

[root@aubin tools]# pwd
/usr/tools
[root@aubin tools]# ll
total 0
drwxr-xr-x.  8   10  143 255 Jun 17  2014 jdk1.8.0_11

tar -zxvf jdk-8u11-linux-x64.tar.gz

配置环境变量

vim /etc/profile

把一下代码添加到文档最末。JAVA_HOME根据自己目录来

JAVA_HOME=/usr/tools/jdk1.8.0_11
CLASSPATH=$JAVA_HOME/lib/
PATH=$PATH:$JAVA_HOME/bin
export PATH JAVA_HOME CLASSPATH

在这里插入图片描述
使环境变量生效

source /etc/profile

检测安装
在任意目录输入 javac 如果出现以下结果则安装成功

 [root@aubin ~]# javac
Usage: javac <options> <source files>
where possible options include:
  -g                         Generate all debugging info
  -g:none                    Generate no debugging info
  -g:{lines,vars,source}     Generate only some debugging info
  -nowarn                    Generate no warnings
  -verbose                   Output messages about what the compiler is doing
  -deprecation               Output source locations where deprecated APIs are used
  -classpath <path>          Specify where to find user class files and annotation processors
  -cp <path>                 Specify where to find user class files and annotation processors
  -sourcepath <path>         Specify where to find input source files
  -bootclasspath <path>      Override location of bootstrap class files
  -extdirs <dirs>            Override location of installed extensions
  -endorseddirs <dirs>       Override location of endorsed standards path
  -proc:{none,only}          Control whether annotation processing and/or compilation is done.
  -processor <class1>[,<class2>,<class3>...] Names of the annotation processors to run; bypasses default discovery process
  -processorpath <path>      Specify where to find annotation processors
  -parameters                Generate metadata for reflection on method parameters
  -d <directory>             Specify where to place generated class files
  -s <directory>             Specify where to place generated source files
  -h <directory>             Specify where to place generated native header files
  -implicit:{none,class}     Specify whether or not to generate class files for implicitly referenced files
  -encoding <encoding>       Specify character encoding used by source files
  -source <release>          Provide source compatibility with specified release
  -target <release>          Generate class files for specific VM version
  -profile <profile>         Check that API used is available in the specified profile
  -version                   Version information
  -help                      Print a synopsis of standard options
  -Akey[=value]              Options to pass to annotation processors
  -X                         Print a synopsis of nonstandard options
  -J<flag>                   Pass <flag> directly to the runtime system
  -Werror                    Terminate compilation if warnings occur
  @<filename>                Read options and filenames from file