linux下jdk环境变量配置

当前版本下载地址

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

解压jdk软件包

[root@laofuxi.com java]# pwd
/usr/local/java

[root@laofuxi.com java]# ls
jdk-8u191-linux-x64.tar.gz

[root@laofuxi.com java]# tar zxvf jdk-8u191-linux-x64.tar.gz

[root@laofuxi.com java]# ls
jdk1.8.0_191  jdk-8u191-linux-x64.tar.gz

配置jdk环境变量

[root@laofuxi.com java]# cd jdk1.8.0_191/

[root@laofuxi.com jdk1.8.0_191]# pwd
/usr/local/java/jdk1.8.0_191

[root@laofuxi.com jdk1.8.0_191]# vim /etc/profile
在文件末尾添加下面内容

JAVA_HOME=/usr/local/java/jdk1.8.0_191
CLASSPATH=.:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar
PATH=$JAVA_HOME/bin:$PATH
export JAVA_HOME CLASSPATH PATH

立即生效

[root@laofuxi.com jdk1.8.0_191]# source /etc/profile

查看效果

[root@laofuxi.com jdk1.8.0_191]# 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.


    -cp <class search path of directories and zip/jar files>
    -classpath <class search path of directories and zip/jar files>
                  A : separated list of directories, JAR archives,
                  and ZIP archives to search for class files.
    -D<name>=<value>
                  set a system property
    -verbose:[class|gc|jni]
                  enable verbose output
    -version      print product version and exit
    -version:<value>
                  Warning: this feature is deprecated and will be removed
                  in a future release.
                  require the specified version to run
    -showversion  print product version and continue
    -jre-restrict-search | -no-jre-restrict-search
                  Warning: this feature is deprecated and will be removed
                  in a future release.
                  include/exclude user private JREs in the version search
    -? -help      print this help message
    -X            print help on non-standard options
    -ea[:<packagename>...|:<classname>]
    -enableassertions[:<packagename>...|:<classname>]
                  enable assertions with specified granularity
    -da[:<packagename>...|:<classname>]
    -disableassertions[:<packagename>...|:<classname>]
                  disable assertions with specified granularity
    -esa | -enablesystemassertions
                  enable system assertions
    -dsa | -disablesystemassertions
                  disable system assertions
    -agentlib:<libname>[=<options>]
                  load native agent library <libname>, e.g. -agentlib:hprof
                  see also, -agentlib:jdwp=help and -agentlib:hprof=help
    -agentpath:<pathname>[=<options>]
                  load native agent library by full pathname
    -javaagent:<jarpath>[=<options>]
                  load Java programming language agent, see java.lang.instrument
    -splash:<imagepath>
                  show splash screen with specified image
See http://www.oracle.com/technetwork/java/javase/documentation/index.html for more details.

linux下配置jdk环境变量完成。

最后编辑：2018-11-06

作者：劳福喜

这个作者貌似有点懒，什么都没有留下。

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