发布时间:2018-04-23作者:laosun阅读(2837)
首先查询yum源库内含有的java版本
[root@CentOS_7 java]# yum search openjdk ========================================================= N/S matched: openjdk ========================================================= 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-accessibility.x86_64 : OpenJDK accessibility connector 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-headless.x86_64 : The OpenJDK runtime environment without audio and video support 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.i686 : OpenJDK Runtime Environment java-1.8.0-openjdk.x86_64 : OpenJDK Runtime Environment java-1.8.0-openjdk-accessibility.i686 : OpenJDK accessibility connector java-1.8.0-openjdk-accessibility.x86_64 : OpenJDK accessibility connector java-1.8.0-openjdk-accessibility-debug.i686 : OpenJDK accessibility connector for packages with debug on java-1.8.0-openjdk-accessibility-debug.x86_64 : OpenJDK accessibility connector for packages with debug on java-1.8.0-openjdk-debug.i686 : OpenJDK Runtime Environment with full debug on java-1.8.0-openjdk-debug.x86_64 : OpenJDK Runtime Environment with full debug on java-1.8.0-openjdk-demo.i686 : OpenJDK Demos java-1.8.0-openjdk-demo.x86_64 : OpenJDK Demos java-1.8.0-openjdk-demo-debug.i686 : OpenJDK Demos with full debug on java-1.8.0-openjdk-demo-debug.x86_64 : OpenJDK Demos with full debug on java-1.8.0-openjdk-devel.i686 : OpenJDK Development Environment java-1.8.0-openjdk-devel.x86_64 : OpenJDK Development Environment java-1.8.0-openjdk-devel-debug.i686 : OpenJDK Development Environment with full debug on java-1.8.0-openjdk-devel-debug.x86_64 : OpenJDK Development Environment with full debug on java-1.8.0-openjdk-headless.i686 : OpenJDK Runtime Environment java-1.8.0-openjdk-headless.x86_64 : OpenJDK Runtime Environment java-1.8.0-openjdk-headless-debug.i686 : OpenJDK Runtime Environment with full debug on java-1.8.0-openjdk-headless-debug.x86_64 : OpenJDK Runtime Environment with full debug on java-1.8.0-openjdk-javadoc.noarch : OpenJDK API Documentation java-1.8.0-openjdk-javadoc-debug.noarch : OpenJDK API Documentation for packages with debug on java-1.8.0-openjdk-javadoc-zip.noarch : OpenJDK API Documentation compressed in single archive java-1.8.0-openjdk-javadoc-zip-debug.noarch : OpenJDK API Documentation compressed in single archive for packages with debug on java-1.8.0-openjdk-src.i686 : OpenJDK Source Bundle java-1.8.0-openjdk-src.x86_64 : OpenJDK Source Bundle java-1.8.0-openjdk-src-debug.i686 : OpenJDK Source Bundle for packages with debug on java-1.8.0-openjdk-src-debug.x86_64 : OpenJDK Source Bundle for packages with debug on icedtea-web.x86_64 : Additional Java components for OpenJDK - Java browser plug-in and Web Start implementation Name and summary matches only, use "search all" for everything.
这里呢,我们选择安装1.7,在这里呢我就全部安装了。
[root@CentOS_7 java]# yum -y install java-1.7.0-openjdk*
等待安装完成,配置环境变量。
[root@CentOS_7 java]# vim /etc/profile #配置环境变量,增加下边的内容。在文件最上边添加一下即可
export JAVA_HOME=/usr/lib/jvm/jdk1.8.0_131 export JRE_HOME=${JAVA_HOME}/jre export CLASSPATH=.:${JAVA_HOME}/lib:${JRE_HOME}/lib export PATH=${JAVA_HOME}/bin:$PATH
[root@CentOS_7 java]# source /etc/profile #重新加载一下这个文件
然后我们找到目录创建一个Hello.java
public class Hello { public static void main(String[] args) { System.out.println("Hello world!!!"); } }
测试一下运行是否正常
[root@CentOS_7 java]# javac Hello.java [root@CentOS_7 java]# java Hello Hello world!!!
检查一下jdk版本:
[root@CentOS_7 java]# java -version java version "1.7.0_171" OpenJDK Runtime Environment (rhel-2.6.13.0.el7_4-x86_64 u171-b01) OpenJDK 64-Bit Server VM (build 24.171-b01, mixed mode)
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原文地址: https://www.sunjs.com/article/detail/537bc04e37574f0ebb4252a25ef55d7f.html
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