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  • 用yum安装JDK

    用yum安装JDK

    1.查看yum库中都有哪些jdk版本(暂时只发现了openjdk)

    [root@localhost ~]# yum search java|grep jdk
    ldapjdk-javadoc.x86_64 : Javadoc for ldapjdk
    java-1.6.0-openjdk.x86_64 : OpenJDK Runtime Environment
    java-1.6.0-openjdk-demo.x86_64 : OpenJDK Demos
    java-1.6.0-openjdk-devel.x86_64 : OpenJDK Development Environment
    java-1.6.0-openjdk-javadoc.x86_64 : OpenJDK API Documentation
    java-1.6.0-openjdk-src.x86_64 : OpenJDK Source Bundle
    java-1.7.0-openjdk.x86_64 : OpenJDK Runtime Environment
    java-1.7.0-openjdk-demo.x86_64 : OpenJDK Demos
    java-1.7.0-openjdk-devel.x86_64 : OpenJDK Development Environment
    java-1.7.0-openjdk-javadoc.noarch : OpenJDK API Documentation
    java-1.7.0-openjdk-src.x86_64 : OpenJDK Source Bundle
    java-1.8.0-openjdk.x86_64 : OpenJDK Runtime Environment
    java-1.8.0-openjdk-demo.x86_64 : OpenJDK Demos
    java-1.8.0-openjdk-devel.x86_64 : OpenJDK Development Environment
    java-1.8.0-openjdk-headless.x86_64 : OpenJDK Runtime Environment
    java-1.8.0-openjdk-javadoc.noarch : OpenJDK API Documentation
    java-1.8.0-openjdk-src.x86_64 : OpenJDK Source Bundle
    ldapjdk.x86_64 : The Mozilla LDAP Java SDK

    2.选择版本,进行安装

    //选择1.7版本进行安装
    [root@localhost ~]# yum install java-1.7.0-openjdk
    //安装完之后,默认的安装目录是在: /usr/lib/jvm/java-1.7.0-openjdk-1.7.0.75.x86_64

    3.设置环境变量

    [root@localhost ~]# vi /etc/profile

    在profile文件中添加如下内容

    #set java environment
    JAVA_HOME=/usr/lib/jvm/java-1.7.0-openjdk-1.7.0.75.x86_64
    JRE_HOME=$JAVA_HOME/jre
    CLASS_PATH=.:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar:$JRE_HOME/lib
    PATH=$PATH:$JAVA_HOME/bin:$JRE_HOME/bin
    export JAVA_HOME JRE_HOME CLASS_PATH PATH

    让修改生效

    [root@localhost java]# source /etc/profile

    4.验证JDK有效性

    [root@localhost java]# java -version
    java version "1.7.0_79"
    Java(TM) SE Runtime Environment (build 1.7.0_79-b15)
    Java HotSpot(TM) 64-Bit Server VM (build 24.79-b02, mixed mode)

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  • 原文地址:https://www.cnblogs.com/jdonson/p/10090282.html
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