Linux下安装jdk1.8并配置环境变量的教程
<p>1.去官网下载对应版本的安装包，64位系统对应64位的安装包</p>
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2.新建一个目录，如：<code>/usr/lib/jdk</code></p>
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3.把安装包移动到新建的jdk目录下，并解压缩，得到目录jdk1.8.0_161</p>
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4.此时要配置环境变量了，使用<code>sudo gedit /etc/environment</code>，打开文件，在末尾添加</p>
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<code class="bash plain">PATH=</code><code class="bash string">"/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games:$JAVA_HOME/bin"</code>
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<code class="bash functions">export</code> <code class="bash plain">CLASSPATH=.:$JAVA_HOME</code><code class="bash plain">/lib</code><code class="bash plain">:$JAVA_HOME</code><code class="bash plain">/jre/lib</code>
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<code class="bash functions">export</code> <code class="bash plain">JAVA_HOME=</code><code class="bash plain">/usr/lib/jdk/jdk1</code><code class="bash plain">.8.0_161</code>
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5.修改完使用命令<code>source /etc/environment</code>，让修改的配置立马生效</p>
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6.java -version查看，显示jdk版本信息，则配置成功</p>
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7.再去修改所有用户的环境变量，<code>sudo gedit /etc/profile</code>，末尾添加</p>
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<code class="bash comments">#set Java environment</code>
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<code class="bash functions">export</code> <code class="bash plain">JAVA_HOME=</code><code class="bash plain">/usr/lib/jdk/jdk1</code><code class="bash plain">.8.0_161</code>
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<code class="bash functions">export</code> <code class="bash plain">JRE_HOME=$JAVA_HOME</code><code class="bash plain">/jre</code>
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<code class="bash functions">export</code> <code class="bash plain">CLASSPATH=.:$JAVA_HOME</code><code class="bash plain">/lib</code><code class="bash plain">:$JRE_HOME</code><code class="bash plain">/lib</code><code class="bash plain">:$CLASSPATH</code>
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<code class="bash functions">export</code> <code class="bash plain">PATH=$JAVA_HOME</code><code class="bash plain">/bin</code><code class="bash plain">:$JRE_HOME</code><code class="bash plain">/bin</code><code class="bash plain">:$PATH</code>
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8.使用命令source /etc/profile，让配置生效</p>
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9.java -version验证</p>
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<span><strong>下面看下JDK1.8环境变量配置</strong></span></p>
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新建用户变量：JAVA_HOME 、CLASSPATH 和系统Path</p>
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变量名：JAVA_HOME</p>
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变量值：C:\Program Files\Java\jdk1.8.0_102</p>
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变量名：CLASSPATH</p>
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变量值：.;%JAVA_HOME%\lib\dt.jar;%JAVA_HOME%\lib\tools.jar</p>
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变量名：Path</p>
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变量值：C:\Program Files\Java\jdk1.8.0_102\bin;C:\Program Files\Java\jdk1.8.0_102\jre\bin;</p>
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测试环境变量配置是否成功。同时按住Win和R键，桌面左下角弹出‘运行'窗口，输入cmd，再回车；跳出DOS命令行窗口输入依次输入“JAVAC”、“java”、“java -version”，</p>
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<span><strong>总结</strong></span></p>
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以上所述是小编给大家介绍的Linux下安装jdk1.8并配置环境变量的教程，希望对大家有所帮助，如果大家有任何疑问请给我留言，小编会及时回复大家的。在此也非常感谢大家对网站的支持！</p>
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原文链接：https://blog.csdn.net/zifengye520/article/details/79737973</p>
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