{"id":11973,"date":"2022-09-16T06:02:00","date_gmt":"2022-09-16T06:02:00","guid":{"rendered":"https:\/\/www.varidata.com\/kb\/how-to-install-java-on-ubuntu-18-04"},"modified":"2022-10-10T01:19:44","modified_gmt":"2022-10-10T01:19:44","slug":"how-to-install-java-on-ubuntu-18-04","status":"publish","type":"kb","link":"https:\/\/www.varidata.com\/zh-cn\/kb\/how-to-install-java-on-ubuntu-18-04\/","title":{"rendered":"\u5982\u4f55\u5728Ubuntu 18.04\u4e0a\u5b89\u88c5Java\uff1f"},"content":{"rendered":"<div class=\"wpb-content-wrapper\"><p>[vc_row gap=&#8221;25&#8243; css=&#8221;.vc_custom_1661417481090{margin-top: 0px !important;margin-bottom: 0px !important;padding-top: 0px !important;padding-bottom: 0px !important;}&#8221; el_class=&#8221;kb-wrapper&#8221;][vc_column css=&#8221;.vc_custom_1659597638453{margin-top: 0px !important;padding-top: 0px !important;border-radius: 20px !important;}&#8221;][vc_column_text el_class=&#8221;sub-title&#8221; css=&#8221;.vc_custom_1659597647622{margin-top: 0px !important;margin-bottom: 0px !important;padding-top: 0px !important;}&#8221;]Objective[\/vc_column_text][vc_column_text el_class=&#8221;content&#8221; css=&#8221;.vc_custom_1664158436136{margin-top: 0px !important;margin-bottom: 0px !important;padding-top: 0px !important;padding-bottom: 0px !important;}&#8221;]Java\u662f\u4e00\u4e2a\u8f6f\u4ef6\u5e73\u53f0\uff0c\u5b83\u5141\u8bb8\u7f16\u8bd1\u548c\u6267\u884c\u7528Java\u8bed\u8a00\u7f16\u5199\u7684\u8f6f\u4ef6\u3002Java\u652f\u6301\u8de8\u5e73\u53f0\u7f16\u8bd1\u548c\u6267\u884c\u5e94\u7528\u7a0b\u5e8f\uff0c\u4e0d\u7ba1\u4f7f\u7528\u7684\u662f\u4ec0\u4e48\u786c\u4ef6\u3002<br \/>\n\u9996\u5148\uff0c\u901a\u8fc7SSH\u8fde\u63a5\u8fde\u63a5\u5230\u670d\u52a1\u5668\u3002\u60a8\u53ef\u4ee5\u6309\u7167\u6211\u4eec\u7684\u6307\u5357\u5b89\u5168\u5730\u4f7f\u7528SSH\u8fdb\u884c\u8fde\u63a5\u3002\u5982\u679c\u662f\u672c\u5730\u670d\u52a1\u5668\uff0c\u5219\u8fdb\u5165\u4e0b\u4e00\u6b65\uff0c\u6253\u5f00\u670d\u52a1\u5668\u7684\u7ec8\u7aef\u3002[\/vc_column_text][vc_column_text el_class=&#8221;sub-title&#8221; css=&#8221;.vc_custom_1664158442704{margin-top: 0px !important;margin-bottom: 0px !important;}&#8221;]\u5b89\u88c5Java &#8211; JRE[\/vc_column_text][vc_column_text el_class=&#8221;content&#8221; css=&#8221;.vc_custom_1664158492485{margin-top: 0px !important;margin-bottom: 0px !important;padding-top: 0px !important;padding-bottom: 0px !important;}&#8221;]\u9996\u5148\uff0c\u53ef\u4ee5\u901a\u8fc7\u4ee5\u4e0b\u547d\u4ee4\u786e\u5b9aJava\u662f\u5426\u5df2\u7ecf\u5b89\u88c5\uff1a<\/p>\n<pre><code>$ java - version<\/code><\/pre>\n<p>\u5982\u679c\u5c4f\u5e55\u663e\u793a\u5982\u4e0b\u4fe1\u606f\uff1a<\/p>\n<pre><code>Command 'java' not found<\/code><\/pre>\n<p>\u8fd9\u8868\u793a\u7cfb\u7edf\u672a\u5b89\u88c5Java\u3002\u56e0\u6b64\uff0c\u9700\u8981\u5b89\u88c5\u8fd0\u884c\u5927\u591a\u6570Java\u8f6f\u4ef6\u7684Java\u8fd0\u884c\u65f6\u73af\u5883\u3002\u66f4\u65b0\u5e76\u786e\u4fdd\u4e0b\u8f7d\u6700\u65b0\u7248\u672c\uff1a<\/p>\n<pre><code>$ sudo apt update<\/code><\/pre>\n<p>\u5f00\u59cb\u5b89\u88c5Java\u8fd0\u884c\u65f6\u73af\u5883\uff1a<\/p>\n<pre><code>$ sudo apt install default-jre<\/code><\/pre>\n<p>\u68c0\u67e5\u5b89\u88c5\u662f\u5426\u6b63\u786e\uff1a<\/p>\n<pre><code>$ java - version<\/code><\/pre>\n<p>\u5982\u679c\u5b89\u88c5\u6210\u529f\uff0c\u8be5\u547d\u4ee4\u4f1a\u663e\u793aJRE\u7684\u5177\u4f53\u7248\u672c\u3002[\/vc_column_text][vc_column_text el_class=&#8221;sub-title&#8221; css=&#8221;.vc_custom_1664158504400{margin-top: 0px !important;margin-bottom: 0px !important;}&#8221;]\u5b89\u88c5OpenJDK[\/vc_column_text][vc_column_text el_class=&#8221;content&#8221; css=&#8221;.vc_custom_1664158531699{margin-top: 0px !important;margin-bottom: 0px !important;padding-top: 0px !important;padding-bottom: 0px !important;}&#8221;]\u8981\u4f7f\u7528Java Development Kit\u7f16\u8bd1\u6216\u8fd0\u884cJava\u8f6f\u4ef6\uff0c\u8bf7\u6309\u4ee5\u4e0b\u6b65\u9aa4\u64cd\u4f5c\uff1a<\/p>\n<pre><code>$ sudo apt install default-jdk<\/code><\/pre>\n<p>\u901a\u8fc7\u663e\u793aJava\u7f16\u8bd1\u5668javac\u7684\u7248\u672c\u6765\u68c0\u67e5\u5b89\u88c5\u60c5\u51b5\uff1a<\/p>\n<pre><code>$ javac - version<\/code><\/pre>\n<p>\u5982\u679c\u5b89\u88c5\u6210\u529f\uff0cjavac\u7248\u672c\u4e5f\u4f1a\u663e\u793a\uff1a<\/p>\n<pre><code>javac 10.0.0<\/code><\/pre>\n<p>[\/vc_column_text][vc_column_text el_class=&#8221;sub-title&#8221; css=&#8221;.vc_custom_1664158539496{margin-top: 0px !important;margin-bottom: 0px !important;}&#8221;]\u591a\u7248\u672cJava\u7ba1\u7406[\/vc_column_text][vc_column_text el_class=&#8221;content&#8221; css=&#8221;.vc_custom_1664158564922{margin-top: 0px !important;margin-bottom: 0px !important;padding-top: 0px !important;padding-bottom: 0px !important;}&#8221;]\u60a8\u53ef\u4ee5\u4f7f\u7528update-alternatives\u547d\u4ee4\u8bbe\u7f6e\u9ed8\u8ba4\u7684Java\u7248\u672c\uff1a<\/p>\n<pre><code>$ sudo update-alternatives --config java<\/code><\/pre>\n<p>\u5c4f\u5e55\u4f1a\u663e\u793a\uff1a<\/p>\n<pre><code>There are 3 choices for the alternative java (providing \/usr\/bin\/java).\r\n                  Selection    Path                                   Priority Status\r\n\r\n------------------------------------------------------------\r\n\r\n* 0            \/usr\/lib\/jvm\/java-11-openjdk-amd64\/bin\/java      1101 auto mode\r\n\r\n  1            \/usr\/lib\/jvm\/java-11-openjdk-amd64\/bin\/java      1101 manual mode\r\n\r\n  2            \/usr\/lib\/jvm\/java-8-openjdk-amd64\/jre\/bin\/java   1081 manual mode\r\n\r\n  3            \/usr\/lib\/jvm\/java-8-oracle\/jre\/bin\/java          1081 manual mode<\/code><\/pre>\n<p>\u8f93\u5165\u4e0e\u60a8\u504f\u597d\u7684Java\u7248\u672c\u76f8\u5173\u8054\u7684\u6570\u5b57\uff0c\u5c06\u5176\u8bbe\u7f6e\u4e3a\u201c\u9ed8\u8ba4\u201d\uff0c\u6216\u6309ENTER\u952e\u4fdd\u6301\u5f53\u524d\u7248\u672c\u4e3a\u9ed8\u8ba4\u3002[\/vc_column_text][vc_column_text el_class=&#8221;sub-title&#8221; css=&#8221;.vc_custom_1664158572145{margin-top: 0px !important;margin-bottom: 0px !important;}&#8221;]\u8bbe\u7f6eJAVA_HOME\u73af\u5883[\/vc_column_text][vc_column_text el_class=&#8221;content&#8221; css=&#8221;.vc_custom_1664158639590{margin-top: 0px !important;margin-bottom: 0px !important;padding-top: 0px !important;padding-bottom: 0px !important;}&#8221;]\u4e0d\u540c\u7684\u8f6f\u4ef6\u4f7f\u7528JAVA_HOME\u53d8\u91cf\u6765\u5b9a\u4f4d\u8981\u4f7f\u7528\u7684java\u7248\u672c\u3002\u8981\u8bbe\u7f6e\u8981\u4f7f\u7528\u7684\u7248\u672c\uff0c\u9996\u5148\u4f7f\u7528update-alternatives\u547d\u4ee4\u68c0\u67e5\u7cfb\u7edf\u4e0a\u5f53\u524d\u7684Java\u5b89\u88c5\uff1a<\/p>\n<pre><code>$ sudo update-alternatives --config java<\/code><\/pre>\n<p>\u7cfb\u7edf\u4f1a\u663e\u793aJava\u5b89\u88c5\u8def\u5f84\uff0c\u5982\u4e0b\u56fe\u6240\u793a\uff1a<\/p>\n<pre><code>There are 3 choices for the alternative java (providing \/usr\/bin\/java).\r\n                  Selection    Path                                   Priority Status\r\n\r\n------------------------------------------------------------\r\n\r\n* 0            \/usr\/lib\/jvm\/java-11-openjdk-amd64\/bin\/java      1101 auto mode\r\n\r\n  1            \/usr\/lib\/jvm\/java-11-openjdk-amd64\/bin\/java      1101 manual mode\r\n\r\n  2            \/usr\/lib\/jvm\/java-8-openjdk-amd64\/jre\/bin\/java   1081 manual mode\r\n\r\n  3            \/usr\/lib\/jvm\/java-8-oracle\/jre\/bin\/java          1081 manual mode<\/code><\/pre>\n<p><span style=\"font-weight: 400;\">\u4f8b\u5982\uff0co\u4f7f\u7528\u7248\u672c11\uff0c\u590d\u5236\u4ee5\u4e0b\u8def\u5f84\uff1a<\/span><\/p>\n<pre><code>\/usr\/lib\/jvm\/java-11-openjdk-amd64\/bin\/<\/code><\/pre>\n<p>\u7136\u540e\u7f16\u8f91\/etc\/ environment\u6587\u4ef6\uff1a<\/p>\n<pre><code>$ sudo nano \/etc\/environment<\/code><\/pre>\n<p>\u5728\u6587\u4ef6\u672b\u5c3e\u6dfb\u52a0\uff1a<\/p>\n<pre><code>JAVA_HOME=\"\/usr\/lib\/jvm\/java-11-openjdk-amd64\/bin\/\"<\/code><\/pre>\n<p>\u4fdd\u5b58\u5e76\u5173\u95ed\u8be5\u6587\u4ef6\u3002<br \/>\n\u6b64\u65f6\uff0c\u7cfb\u7edf\u6240\u6709\u7528\u6237\u76f8\u5bf9\u4e8eJAVA_HOME\u53d8\u91cf\u7684\u8def\u5f84\u5c06\u88ab\u4fee\u6539\u4f7f\u7528source\u547d\u4ee4\u91cd\u65b0\u52a0\u8f7d\u6587\u4ef6\u4ee5\u5e94\u7528\u66f4\u6539\uff1a<\/p>\n<pre><code>$ source \/etc\/environment<\/code><\/pre>\n<p>\u6700\u540e\uff0c\u5c06\u53d8\u91cf\u6253\u5370\u5728\u5c4f\u5e55\u4e0a\uff0c\u68c0\u67e5\u53d8\u91cf\u8bbe\u7f6e\u662f\u5426\u6b63\u786e\uff1a<\/p>\n<pre><code>$ echo $JAVA_HOME\r\n\/usr\/lib\/jvm\/java-11-openjdk-amd64\/bin\/<\/code><\/pre>\n<p>[\/vc_column_text][\/vc_column][\/vc_row]<\/p>\n<\/div>","protected":false},"featured_media":0,"template":"","kb_category":[465],"class_list":["post-11973","kb","type-kb","status-publish","hentry","kb_category-ubuntu-sc"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.3 - 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