\u5728\u7576\u4eca\u7684\u958b\u767c\u74b0\u5883\u4e2d\uff0cJava \u662f\u4e00\u7a2e\u5ee3\u6cdb\u4f7f\u7528\u7684\u7de8\u7a0b\u8a9e\u8a00\uff0c\u9069\u7528\u65bc\u5404\u7a2e\u61c9\u7528\u7a0b\u5e8f\u7684\u958b\u767c\u3002\u672c\u6587\u5c07\u6307\u5c0e\u60a8\u5982\u4f55\u5728 Ubuntu 18.04.1 \u4e0a\u642d\u5efa Java \u74b0\u5883\uff0c\u4e26\u7de8\u5beb\u4e00\u500b\u7c21\u55ae\u7684 Hello World \u7a0b\u5f0f\u3002<\/p>\n
\u9996\u5148\uff0c\u60a8\u9700\u8981\u5b89\u88dd Java \u958b\u767c\u5de5\u5177\u5305 (JDK)\u3002\u5728 Ubuntu \u4e2d\uff0c\u60a8\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u6b65\u9a5f\u4f86\u5b89\u88dd JDK\uff1a<\/p>\n
sudo apt update\nsudo apt install openjdk-8-jdk\n<\/code><\/pre>\n\u9019\u5c07\u5b89\u88dd OpenJDK 8\uff0c\u9019\u662f Java \u7684\u4e00\u500b\u958b\u6e90\u5be6\u73fe\u3002\u5b89\u88dd\u5b8c\u6210\u5f8c\uff0c\u60a8\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u547d\u4ee4\u4f86\u6aa2\u67e5 Java \u662f\u5426\u5b89\u88dd\u6210\u529f\uff1a<\/p>\n
java -version\n<\/code><\/pre>\n\u5982\u679c\u5b89\u88dd\u6210\u529f\uff0c\u60a8\u5c07\u770b\u5230\u985e\u4f3c\u4ee5\u4e0b\u7684\u8f38\u51fa\uff1a<\/p>\n
openjdk version \"1.8.0_252\"\nOpenJDK Runtime Environment (build 1.8.0_252-8u252-b09-1ubuntu1)\nOpenJDK 64-Bit Server VM (build 25.252-b09, mixed mode)\n<\/code><\/pre>\n\u8a2d\u7f6e\u74b0\u5883\u8b8a\u91cf<\/h2>\n
\u70ba\u4e86\u65b9\u4fbf\u4f7f\u7528 Java\uff0c\u60a8\u53ef\u4ee5\u8a2d\u7f6e\u74b0\u5883\u8b8a\u91cf\u3002\u7de8\u8f2f\u60a8\u7684\u74b0\u5883\u8b8a\u91cf\u914d\u7f6e\u6587\u4ef6\uff1a<\/p>\n
sudo nano \/etc\/environment\n<\/code><\/pre>\n\u5728\u6587\u4ef6\u7684\u672b\u5c3e\u6dfb\u52a0\u4ee5\u4e0b\u884c\uff1a<\/p>\n
JAVA_HOME=\"\/usr\/lib\/jvm\/java-8-openjdk-amd64\"\nPATH=\"$PATH:$JAVA_HOME\/bin\"\n<\/code><\/pre>\n\u4fdd\u5b58\u4e26\u9000\u51fa\u7de8\u8f2f\u5668\u3002\u7136\u5f8c\uff0c\u4f7f\u7528\u4ee5\u4e0b\u547d\u4ee4\u4f7f\u66f4\u6539\u751f\u6548\uff1a<\/p>\n
source \/etc\/environment\n<\/code><\/pre>\n\u7de8\u5beb Hello World \u7a0b\u5f0f<\/h2>\n
\u73fe\u5728\uff0c\u60a8\u5df2\u7d93\u6210\u529f\u5b89\u88dd\u4e86 Java \u74b0\u5883\uff0c\u63a5\u4e0b\u4f86\u6211\u5011\u5c07\u7de8\u5beb\u4e00\u500b\u7c21\u55ae\u7684 Hello World \u7a0b\u5f0f\u3002\u9996\u5148\uff0c\u5275\u5efa\u4e00\u500b\u65b0\u7684 Java \u6a94\u6848\uff1a<\/p>\n
nano HelloWorld.java\n<\/code><\/pre>\n\u5728\u7de8\u8f2f\u5668\u4e2d\u8f38\u5165\u4ee5\u4e0b\u4ee3\u78bc\uff1a<\/p>\n
public class HelloWorld {\n public static void main(String[] args) {\n System.out.println(\"Hello, World!\");\n }\n}\n<\/code><\/pre>\n\u4fdd\u5b58\u4e26\u9000\u51fa\u7de8\u8f2f\u5668\u3002\u63a5\u4e0b\u4f86\uff0c\u4f7f\u7528\u4ee5\u4e0b\u547d\u4ee4\u7de8\u8b6f Java \u7a0b\u5f0f\uff1a<\/p>\n
javac HelloWorld.java\n<\/code><\/pre>\n\u5982\u679c\u7de8\u8b6f\u6210\u529f\uff0c\u5c07\u4e0d\u6703\u6709\u4efb\u4f55\u932f\u8aa4\u6d88\u606f\u3002\u63a5\u4e0b\u4f86\uff0c\u904b\u884c\u60a8\u7684\u7a0b\u5f0f\uff1a<\/p>\n
java HelloWorld\n<\/code><\/pre>\n\u60a8\u61c9\u8a72\u6703\u770b\u5230\u4ee5\u4e0b\u8f38\u51fa\uff1a<\/p>\n
Hello, World!\n<\/code><\/pre>\n\u7e3d\u7d50<\/h2>\n
\u5728\u672c\u6587\u4e2d\uff0c\u6211\u5011\u4ecb\u7d39\u4e86\u5982\u4f55\u5728 Ubuntu 18.04.1 \u4e0a\u642d\u5efa Java \u74b0\u5883\uff0c\u4e26\u7de8\u5beb\u4e00\u500b\u7c21\u55ae\u7684 Hello World \u7a0b\u5f0f\u3002\u9019\u4e9b\u6b65\u9a5f\u70ba\u60a8\u63d0\u4f9b\u4e86\u57fa\u790e\u7684 Java \u958b\u767c\u74b0\u5883\uff0c\u60a8\u53ef\u4ee5\u5728\u6b64\u57fa\u790e\u4e0a\u9032\u4e00\u6b65\u63a2\u7d22\u66f4\u8907\u96dc\u7684\u61c9\u7528\u7a0b\u5e8f\u958b\u767c\u3002\u5982\u679c\u60a8\u9700\u8981\u7a69\u5b9a\u7684 VPS<\/a> \u4f86\u9032\u884c\u958b\u767c\uff0cServer.HK \u63d0\u4f9b\u591a\u7a2e\u9078\u64c7\uff0c\u9069\u5408\u4e0d\u540c\u9700\u6c42\u7684\u7528\u6236\u3002\u7121\u8ad6\u662f \u9999\u6e2f\u4f3a\u670d\u5668<\/a> \u9084\u662f\u5176\u4ed6\u5730\u5340\u7684\u670d\u52d9\uff0c\u60a8\u90fd\u53ef\u4ee5\u627e\u5230\u5408\u9069\u7684\u89e3\u6c7a\u65b9\u6848\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"Learn how to set up a Java environment on Ubuntu 18.04.1 and create your first “Hello World” program with this step-by-step guide.<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4924],"tags":[],"class_list":["post-51637","post","type-post","status-publish","format-standard","hentry","category-setup-tutorials"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/51637","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=51637"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/51637\/revisions"}],"predecessor-version":[{"id":51638,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/51637\/revisions\/51638"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=51637"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=51637"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=51637"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}