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一、什么是 JDK\nJDK（Java Development Kit）是 Java 开发工具包，用于开发、编译、运行和调试 Java 程序。\n\nJDK 主要包含：\n\n+ Java 编译器（javac）\n+ Java 运行环境（JRE）\n+ Java 虚拟机（JVM）\n+ 调试工具\n+ 打包工具\n\nJava 开发必须先安装 JDK。\n\n# 二、选择JDK版本\n目前主流版本：\n\n| 版本 | 类型 | 推荐指数 |\n| --- | --- | --- |\n| JDK 8 | LTS长期支持 | ★★★★ |\n| JDK 17 | LTS长期支持 | ★★★★ |\n| JDK 21 | LTS长期支持 | ★★★★★ |\n| JDK 25 | LTS长期支持 | ★★★★ |\n\n\n推荐：\n\n+ 学校课程：JDK 8\n+ SpringBoot3 项目：JDK 17+\n+ 新项目开发：JDK 21+\n\n# 三、下载JDK\n## 方式一：Oracle官网下载\n官网：\n\n[https:\u002F\u002Fwww.oracle.com\u002Fjava\u002Ftechnologies\u002Fdownloads\u002F](https:\u002F\u002Fwww.oracle.com\u002Fjava\u002Ftechnologies\u002Fdownloads\u002F)\n\n## 方式二：OpenJDK下载（推荐）\n优点：\n\n+ 免费\n+ 开源\n+ 企业广泛使用\n+ 无商业授权限制\n\n# 四、安装JDK\n直接解压zip或者双击exe。\n\n# 五、配置环境变量\n## 配置 JAVA_HOME\n打开：\n\n```latex\n此电脑\n→ 属性\n→ 高级系统设置\n→ 环境变量\n```\n\n新建系统变量：\n\n变量名：\n\n```latex\nJAVA_HOME\n```\n\n变量值：\n\n```latex\nD:\\Environment\\jdk-21\n```\n\nPath新增：\n\n```latex\n%JAVA_HOME%\\bin\n```\n\n## 验证配置\n打开 cmd：\n\n```bash\njava -version\n```\n\n输出：\n\n```latex\nopenjdk version \"21\"\n```\n\n说明 Java 运行环境配置成功。\n\n继续执行：\n\n```bash\njavac -version\n```\n\n输出：\n\n```latex\njavac 21\n```\n\n说明 Java 编译器配置成功。\n\n# 六、IDEA中配置JDK\n## 打开设置\n```latex\nFile\n └── Project Structure\n```\n\n或者：\n\n```latex\nCtrl + Alt + Shift + S\n```\n\n## 配置项目JDK\n```latex\nProject Structure\n └── Project\n      └── Project SDK\n```\n\n选择：\n\n```latex\nJDK 21\n```\n\n点击：\n\n```latex\nApply\nOK\n```\n\n即可完成配置。\n\n# 七、运行第一个java程序\n创建文件HelloWorld.java：\n\n```java\npublic class Hello {\n\n    public static void main(String[] args) {\n        System.out.println(\"Hello MakeXu\");\n    }\n\n}\n```\n\n## 编译\n执行：\n\n```bash\njavac Hello.java\n```\n\n生成：\n\n```latex\nHello.class\n```\n\n## 运行\n执行：\n\n```bash\njava Hello\n```\n\n输出：\n\n```latex\nHello MakeXu\n```\n\n\n\n> tips:\n>\n> 先进入程序目录 再执行命令\n>\n> javac Hello.java 命令需要java后缀\n>\n> java Hello 命令不用class后缀\n>\n> jdk11之后可以省略javac  直接java\n>\n\n# 八、常用JDK命令\n```bash\n# 查看版本\njava -version\n\n查看编译器版本\njavac -version\n\n# 编译Java程序\njavac Hello.java\n\n#运行Java程序\njava Hello\n```\n\n# 九、常见问题\n> 根据同学反馈会一直更新常见问题\n>\n\n## 1、 安装 JDK 后提示“不是内部或外部命令”  \n环境变量配置错误。检查JAVA_HOME是否正确配置并且确保在path中的顺序靠前。\n\n\n\n\n","公开",false,1515,6,"2026-07-20 14:41:26","2026-07-20 14:42:21",[],[],{"id":176,"title":177,"slug":47},"2079422978921345025","Maven下载安装与配置教程",[179],{"businessType":180,"businessId":35,"businessName":36,"bindScene":181},"TOOL","GENERAL","\u003Ch1 id=\"%E4%B8%80%E3%80%81%E4%BB%80%E4%B9%88%E6%98%AF-jdk\" tabindex=\"-1\">\u003Ca class=\"header-anchor header-anchor\" href=\"#%E4%B8%80%E3%80%81%E4%BB%80%E4%B9%88%E6%98%AF-jdk\" aria-hidden=\"true\">\u003C\u002Fa> 一、什么是 JDK\u003C\u002Fh1>\n\u003Cp>JDK（Java Development Kit）是 Java 开发工具包，用于开发、编译、运行和调试 Java 程序。\u003C\u002Fp>\n\u003Cp>JDK 主要包含：\u003C\u002Fp>\n\u003Cul>\n\u003Cli>Java 编译器（javac）\u003C\u002Fli>\n\u003Cli>Java 运行环境（JRE）\u003C\u002Fli>\n\u003Cli>Java 虚拟机（JVM）\u003C\u002Fli>\n\u003Cli>调试工具\u003C\u002Fli>\n\u003Cli>打包工具\u003C\u002Fli>\n\u003C\u002Ful>\n\u003Cp>Java 开发必须先安装 JDK。\u003C\u002Fp>\n\u003Ch1 id=\"%E4%BA%8C%E3%80%81%E9%80%89%E6%8B%A9jdk%E7%89%88%E6%9C%AC\" tabindex=\"-1\">\u003Ca class=\"header-anchor header-anchor\" href=\"#%E4%BA%8C%E3%80%81%E9%80%89%E6%8B%A9jdk%E7%89%88%E6%9C%AC\" aria-hidden=\"true\">\u003C\u002Fa> 二、选择JDK版本\u003C\u002Fh1>\n\u003Cp>目前主流版本：\u003C\u002Fp>\n\u003Ctable>\n\u003Cthead>\n\u003Ctr>\n\u003Cth>版本\u003C\u002Fth>\n\u003Cth>类型\u003C\u002Fth>\n\u003Cth>推荐指数\u003C\u002Fth>\n\u003C\u002Ftr>\n\u003C\u002Fthead>\n\u003Ctbody>\n\u003Ctr>\n\u003Ctd>JDK 8\u003C\u002Ftd>\n\u003Ctd>LTS长期支持\u003C\u002Ftd>\n\u003Ctd>★★★★\u003C\u002Ftd>\n\u003C\u002Ftr>\n\u003Ctr>\n\u003Ctd>JDK 17\u003C\u002Ftd>\n\u003Ctd>LTS长期支持\u003C\u002Ftd>\n\u003Ctd>★★★★\u003C\u002Ftd>\n\u003C\u002Ftr>\n\u003Ctr>\n\u003Ctd>JDK 21\u003C\u002Ftd>\n\u003Ctd>LTS长期支持\u003C\u002Ftd>\n\u003Ctd>★★★★★\u003C\u002Ftd>\n\u003C\u002Ftr>\n\u003Ctr>\n\u003Ctd>JDK 25\u003C\u002Ftd>\n\u003Ctd>LTS长期支持\u003C\u002Ftd>\n\u003Ctd>★★★★\u003C\u002Ftd>\n\u003C\u002Ftr>\n\u003C\u002Ftbody>\n\u003C\u002Ftable>\n\u003Cp>推荐：\u003C\u002Fp>\n\u003Cul>\n\u003Cli>学校课程：JDK 8\u003C\u002Fli>\n\u003Cli>SpringBoot3 项目：JDK 17+\u003C\u002Fli>\n\u003Cli>新项目开发：JDK 21+\u003C\u002Fli>\n\u003C\u002Ful>\n\u003Ch1 id=\"%E4%B8%89%E3%80%81%E4%B8%8B%E8%BD%BDjdk\" tabindex=\"-1\">\u003Ca class=\"header-anchor header-anchor\" href=\"#%E4%B8%89%E3%80%81%E4%B8%8B%E8%BD%BDjdk\" aria-hidden=\"true\">\u003C\u002Fa> 三、下载JDK\u003C\u002Fh1>\n\u003Ch2 id=\"%E6%96%B9%E5%BC%8F%E4%B8%80%EF%BC%9Aoracle%E5%AE%98%E7%BD%91%E4%B8%8B%E8%BD%BD\" tabindex=\"-1\">\u003Ca class=\"header-anchor header-anchor\" href=\"#%E6%96%B9%E5%BC%8F%E4%B8%80%EF%BC%9Aoracle%E5%AE%98%E7%BD%91%E4%B8%8B%E8%BD%BD\" aria-hidden=\"true\">\u003C\u002Fa> 方式一：Oracle官网下载\u003C\u002Fh2>\n\u003Cp>官网：\u003C\u002Fp>\n\u003Cp>\u003Ca href=\"https:\u002F\u002Fwww.oracle.com\u002Fjava\u002Ftechnologies\u002Fdownloads\u002F\">https:\u002F\u002Fwww.oracle.com\u002Fjava\u002Ftechnologies\u002Fdownloads\u002F\u003C\u002Fa>\u003C\u002Fp>\n\u003Ch2 id=\"%E6%96%B9%E5%BC%8F%E4%BA%8C%EF%BC%9Aopenjdk%E4%B8%8B%E8%BD%BD%EF%BC%88%E6%8E%A8%E8%8D%90%EF%BC%89\" tabindex=\"-1\">\u003Ca class=\"header-anchor header-anchor\" href=\"#%E6%96%B9%E5%BC%8F%E4%BA%8C%EF%BC%9Aopenjdk%E4%B8%8B%E8%BD%BD%EF%BC%88%E6%8E%A8%E8%8D%90%EF%BC%89\" aria-hidden=\"true\">\u003C\u002Fa> 方式二：OpenJDK下载（推荐）\u003C\u002Fh2>\n\u003Cp>优点：\u003C\u002Fp>\n\u003Cul>\n\u003Cli>免费\u003C\u002Fli>\n\u003Cli>开源\u003C\u002Fli>\n\u003Cli>企业广泛使用\u003C\u002Fli>\n\u003Cli>无商业授权限制\u003C\u002Fli>\n\u003C\u002Ful>\n\u003Ch1 id=\"%E5%9B%9B%E3%80%81%E5%AE%89%E8%A3%85jdk\" tabindex=\"-1\">\u003Ca class=\"header-anchor header-anchor\" href=\"#%E5%9B%9B%E3%80%81%E5%AE%89%E8%A3%85jdk\" aria-hidden=\"true\">\u003C\u002Fa> 四、安装JDK\u003C\u002Fh1>\n\u003Cp>直接解压zip或者双击exe。\u003C\u002Fp>\n\u003Ch1 id=\"%E4%BA%94%E3%80%81%E9%85%8D%E7%BD%AE%E7%8E%AF%E5%A2%83%E5%8F%98%E9%87%8F\" tabindex=\"-1\">\u003Ca class=\"header-anchor header-anchor\" href=\"#%E4%BA%94%E3%80%81%E9%85%8D%E7%BD%AE%E7%8E%AF%E5%A2%83%E5%8F%98%E9%87%8F\" aria-hidden=\"true\">\u003C\u002Fa> 五、配置环境变量\u003C\u002Fh1>\n\u003Ch2 id=\"%E9%85%8D%E7%BD%AE-java_home\" tabindex=\"-1\">\u003Ca class=\"header-anchor header-anchor\" href=\"#%E9%85%8D%E7%BD%AE-java_home\" aria-hidden=\"true\">\u003C\u002Fa> 配置 JAVA_HOME\u003C\u002Fh2>\n\u003Cp>打开：\u003C\u002Fp>\n\u003Cdiv class=\"code-block-wrapper\">\u003Cdiv class=\"code-block-header\">\u003Cspan class=\"code-lang\">latex\u003C\u002Fspan>\u003Cbutton class=\"code-copy-btn\" data-code=\"此电脑\n→ 属性\n→ 高级系统设置\n→ 环境变量\n\" title=\"复制代码\">\u003Csvg xmlns=\"http:\u002F\u002Fwww.w3.org\u002F2000\u002Fsvg\" width=\"16\" height=\"16\" viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\">\u003Crect x=\"9\" y=\"9\" width=\"13\" height=\"13\" rx=\"2\" ry=\"2\"\u002F>\u003Cpath d=\"M5 15H4a2 2 0 0 1-2-2V4a2 2 0 0 1 2-2h9a2 2 0 0 1 2 2v1\"\u002F>\u003C\u002Fsvg>\u003C\u002Fbutton>\u003C\u002Fdiv>\u003Cpre class=\"shiki shiki-themes github-light github-dark\" style=\"--shiki-light:#24292e;--shiki-dark:#e1e4e8;--shiki-light-bg:#fff;--shiki-dark-bg:#24292e\" tabindex=\"0\">\u003Ccode class=\"language-text\">\u003Cspan class=\"line\">\u003Cspan>此电脑\u003C\u002Fspan>\u003C\u002Fspan>\n\u003Cspan class=\"line\">\u003Cspan>→ 属性\u003C\u002Fspan>\u003C\u002Fspan>\n\u003Cspan class=\"line\">\u003Cspan>→ 高级系统设置\u003C\u002Fspan>\u003C\u002Fspan>\n\u003Cspan class=\"line\">\u003Cspan>→ 环境变量\u003C\u002Fspan>\u003C\u002Fspan>\u003C\u002Fcode>\u003C\u002Fpre>\n\u003C\u002Fdiv>\u003Cp>新建系统变量：\u003C\u002Fp>\n\u003Cp>变量名：\u003C\u002Fp>\n\u003Cdiv class=\"code-block-wrapper\">\u003Cdiv class=\"code-block-header\">\u003Cspan class=\"code-lang\">latex\u003C\u002Fspan>\u003Cbutton class=\"code-copy-btn\" data-code=\"JAVA_HOME\n\" title=\"复制代码\">\u003Csvg xmlns=\"http:\u002F\u002Fwww.w3.org\u002F2000\u002Fsvg\" width=\"16\" height=\"16\" viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\">\u003Crect x=\"9\" y=\"9\" width=\"13\" height=\"13\" rx=\"2\" ry=\"2\"\u002F>\u003Cpath d=\"M5 15H4a2 2 0 0 1-2-2V4a2 2 0 0 1 2-2h9a2 2 0 0 1 2 2v1\"\u002F>\u003C\u002Fsvg>\u003C\u002Fbutton>\u003C\u002Fdiv>\u003Cpre class=\"shiki shiki-themes github-light github-dark\" style=\"--shiki-light:#24292e;--shiki-dark:#e1e4e8;--shiki-light-bg:#fff;--shiki-dark-bg:#24292e\" tabindex=\"0\">\u003Ccode class=\"language-text\">\u003Cspan class=\"line\">\u003Cspan>JAVA_HOME\u003C\u002Fspan>\u003C\u002Fspan>\u003C\u002Fcode>\u003C\u002Fpre>\n\u003C\u002Fdiv>\u003Cp>变量值：\u003C\u002Fp>\n\u003Cdiv class=\"code-block-wrapper\">\u003Cdiv class=\"code-block-header\">\u003Cspan class=\"code-lang\">latex\u003C\u002Fspan>\u003Cbutton class=\"code-copy-btn\" data-code=\"D:\\Environment\\jdk-21\n\" title=\"复制代码\">\u003Csvg xmlns=\"http:\u002F\u002Fwww.w3.org\u002F2000\u002Fsvg\" width=\"16\" height=\"16\" viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\">\u003Crect x=\"9\" y=\"9\" width=\"13\" height=\"13\" rx=\"2\" ry=\"2\"\u002F>\u003Cpath d=\"M5 15H4a2 2 0 0 1-2-2V4a2 2 0 0 1 2-2h9a2 2 0 0 1 2 2v1\"\u002F>\u003C\u002Fsvg>\u003C\u002Fbutton>\u003C\u002Fdiv>\u003Cpre class=\"shiki shiki-themes github-light github-dark\" style=\"--shiki-light:#24292e;--shiki-dark:#e1e4e8;--shiki-light-bg:#fff;--shiki-dark-bg:#24292e\" tabindex=\"0\">\u003Ccode class=\"language-text\">\u003Cspan class=\"line\">\u003Cspan>D:\\Environment\\jdk-21\u003C\u002Fspan>\u003C\u002Fspan>\u003C\u002Fcode>\u003C\u002Fpre>\n\u003C\u002Fdiv>\u003Cp>Path新增：\u003C\u002Fp>\n\u003Cdiv class=\"code-block-wrapper\">\u003Cdiv class=\"code-block-header\">\u003Cspan class=\"code-lang\">latex\u003C\u002Fspan>\u003Cbutton class=\"code-copy-btn\" data-code=\"%JAVA_HOME%\\bin\n\" title=\"复制代码\">\u003Csvg xmlns=\"http:\u002F\u002Fwww.w3.org\u002F2000\u002Fsvg\" width=\"16\" height=\"16\" viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\">\u003Crect x=\"9\" y=\"9\" width=\"13\" height=\"13\" rx=\"2\" ry=\"2\"\u002F>\u003Cpath d=\"M5 15H4a2 2 0 0 1-2-2V4a2 2 0 0 1 2-2h9a2 2 0 0 1 2 2v1\"\u002F>\u003C\u002Fsvg>\u003C\u002Fbutton>\u003C\u002Fdiv>\u003Cpre class=\"shiki shiki-themes github-light github-dark\" style=\"--shiki-light:#24292e;--shiki-dark:#e1e4e8;--shiki-light-bg:#fff;--shiki-dark-bg:#24292e\" tabindex=\"0\">\u003Ccode class=\"language-text\">\u003Cspan class=\"line\">\u003Cspan>%JAVA_HOME%\\bin\u003C\u002Fspan>\u003C\u002Fspan>\u003C\u002Fcode>\u003C\u002Fpre>\n\u003C\u002Fdiv>\u003Ch2 id=\"%E9%AA%8C%E8%AF%81%E9%85%8D%E7%BD%AE\" tabindex=\"-1\">\u003Ca class=\"header-anchor header-anchor\" href=\"#%E9%AA%8C%E8%AF%81%E9%85%8D%E7%BD%AE\" aria-hidden=\"true\">\u003C\u002Fa> 验证配置\u003C\u002Fh2>\n\u003Cp>打开 cmd：\u003C\u002Fp>\n\u003Cdiv class=\"code-block-wrapper\">\u003Cdiv class=\"code-block-header\">\u003Cspan class=\"code-lang\">bash\u003C\u002Fspan>\u003Cbutton class=\"code-copy-btn\" data-code=\"java -version\n\" title=\"复制代码\">\u003Csvg xmlns=\"http:\u002F\u002Fwww.w3.org\u002F2000\u002Fsvg\" width=\"16\" height=\"16\" viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\">\u003Crect x=\"9\" y=\"9\" width=\"13\" height=\"13\" rx=\"2\" ry=\"2\"\u002F>\u003Cpath d=\"M5 15H4a2 2 0 0 1-2-2V4a2 2 0 0 1 2-2h9a2 2 0 0 1 2 2v1\"\u002F>\u003C\u002Fsvg>\u003C\u002Fbutton>\u003C\u002Fdiv>\u003Cpre class=\"shiki shiki-themes github-light github-dark\" style=\"--shiki-light:#24292e;--shiki-dark:#e1e4e8;--shiki-light-bg:#fff;--shiki-dark-bg:#24292e\" tabindex=\"0\">\u003Ccode class=\"language-bash\">\u003Cspan class=\"line\">\u003Cspan style=\"--shiki-light:#6F42C1;--shiki-dark:#B392F0\">java\u003C\u002Fspan>\u003Cspan style=\"--shiki-light:#005CC5;--shiki-dark:#79B8FF\"> -version\u003C\u002Fspan>\u003C\u002Fspan>\u003C\u002Fcode>\u003C\u002Fpre>\n\u003C\u002Fdiv>\u003Cp>输出：\u003C\u002Fp>\n\u003Cdiv class=\"code-block-wrapper\">\u003Cdiv class=\"code-block-header\">\u003Cspan class=\"code-lang\">latex\u003C\u002Fspan>\u003Cbutton class=\"code-copy-btn\" data-code=\"openjdk version "21"\n\" title=\"复制代码\">\u003Csvg xmlns=\"http:\u002F\u002Fwww.w3.org\u002F2000\u002Fsvg\" width=\"16\" height=\"16\" viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\">\u003Crect x=\"9\" y=\"9\" width=\"13\" height=\"13\" rx=\"2\" ry=\"2\"\u002F>\u003Cpath d=\"M5 15H4a2 2 0 0 1-2-2V4a2 2 0 0 1 2-2h9a2 2 0 0 1 2 2v1\"\u002F>\u003C\u002Fsvg>\u003C\u002Fbutton>\u003C\u002Fdiv>\u003Cpre class=\"shiki shiki-themes github-light github-dark\" style=\"--shiki-light:#24292e;--shiki-dark:#e1e4e8;--shiki-light-bg:#fff;--shiki-dark-bg:#24292e\" tabindex=\"0\">\u003Ccode class=\"language-text\">\u003Cspan class=\"line\">\u003Cspan>openjdk version \"21\"\u003C\u002Fspan>\u003C\u002Fspan>\u003C\u002Fcode>\u003C\u002Fpre>\n\u003C\u002Fdiv>\u003Cp>说明 Java 运行环境配置成功。\u003C\u002Fp>\n\u003Cp>继续执行：\u003C\u002Fp>\n\u003Cdiv class=\"code-block-wrapper\">\u003Cdiv class=\"code-block-header\">\u003Cspan class=\"code-lang\">bash\u003C\u002Fspan>\u003Cbutton class=\"code-copy-btn\" data-code=\"javac -version\n\" title=\"复制代码\">\u003Csvg xmlns=\"http:\u002F\u002Fwww.w3.org\u002F2000\u002Fsvg\" width=\"16\" height=\"16\" viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\">\u003Crect x=\"9\" y=\"9\" width=\"13\" height=\"13\" rx=\"2\" ry=\"2\"\u002F>\u003Cpath d=\"M5 15H4a2 2 0 0 1-2-2V4a2 2 0 0 1 2-2h9a2 2 0 0 1 2 2v1\"\u002F>\u003C\u002Fsvg>\u003C\u002Fbutton>\u003C\u002Fdiv>\u003Cpre class=\"shiki shiki-themes github-light github-dark\" style=\"--shiki-light:#24292e;--shiki-dark:#e1e4e8;--shiki-light-bg:#fff;--shiki-dark-bg:#24292e\" tabindex=\"0\">\u003Ccode class=\"language-bash\">\u003Cspan class=\"line\">\u003Cspan style=\"--shiki-light:#6F42C1;--shiki-dark:#B392F0\">javac\u003C\u002Fspan>\u003Cspan style=\"--shiki-light:#005CC5;--shiki-dark:#79B8FF\"> -version\u003C\u002Fspan>\u003C\u002Fspan>\u003C\u002Fcode>\u003C\u002Fpre>\n\u003C\u002Fdiv>\u003Cp>输出：\u003C\u002Fp>\n\u003Cdiv class=\"code-block-wrapper\">\u003Cdiv class=\"code-block-header\">\u003Cspan class=\"code-lang\">latex\u003C\u002Fspan>\u003Cbutton class=\"code-copy-btn\" data-code=\"javac 21\n\" title=\"复制代码\">\u003Csvg xmlns=\"http:\u002F\u002Fwww.w3.org\u002F2000\u002Fsvg\" width=\"16\" height=\"16\" viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\">\u003Crect x=\"9\" y=\"9\" width=\"13\" height=\"13\" rx=\"2\" ry=\"2\"\u002F>\u003Cpath d=\"M5 15H4a2 2 0 0 1-2-2V4a2 2 0 0 1 2-2h9a2 2 0 0 1 2 2v1\"\u002F>\u003C\u002Fsvg>\u003C\u002Fbutton>\u003C\u002Fdiv>\u003Cpre class=\"shiki shiki-themes github-light github-dark\" style=\"--shiki-light:#24292e;--shiki-dark:#e1e4e8;--shiki-light-bg:#fff;--shiki-dark-bg:#24292e\" tabindex=\"0\">\u003Ccode class=\"language-text\">\u003Cspan class=\"line\">\u003Cspan>javac 21\u003C\u002Fspan>\u003C\u002Fspan>\u003C\u002Fcode>\u003C\u002Fpre>\n\u003C\u002Fdiv>\u003Cp>说明 Java 编译器配置成功。\u003C\u002Fp>\n\u003Ch1 id=\"%E5%85%AD%E3%80%81idea%E4%B8%AD%E9%85%8D%E7%BD%AEjdk\" tabindex=\"-1\">\u003Ca class=\"header-anchor header-anchor\" href=\"#%E5%85%AD%E3%80%81idea%E4%B8%AD%E9%85%8D%E7%BD%AEjdk\" aria-hidden=\"true\">\u003C\u002Fa> 六、IDEA中配置JDK\u003C\u002Fh1>\n\u003Ch2 id=\"%E6%89%93%E5%BC%80%E8%AE%BE%E7%BD%AE\" tabindex=\"-1\">\u003Ca class=\"header-anchor header-anchor\" href=\"#%E6%89%93%E5%BC%80%E8%AE%BE%E7%BD%AE\" aria-hidden=\"true\">\u003C\u002Fa> 打开设置\u003C\u002Fh2>\n\u003Cdiv class=\"code-block-wrapper\">\u003Cdiv class=\"code-block-header\">\u003Cspan class=\"code-lang\">latex\u003C\u002Fspan>\u003Cbutton class=\"code-copy-btn\" data-code=\"File\n └── Project Structure\n\" title=\"复制代码\">\u003Csvg xmlns=\"http:\u002F\u002Fwww.w3.org\u002F2000\u002Fsvg\" width=\"16\" height=\"16\" viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\">\u003Crect x=\"9\" y=\"9\" width=\"13\" height=\"13\" rx=\"2\" ry=\"2\"\u002F>\u003Cpath d=\"M5 15H4a2 2 0 0 1-2-2V4a2 2 0 0 1 2-2h9a2 2 0 0 1 2 2v1\"\u002F>\u003C\u002Fsvg>\u003C\u002Fbutton>\u003C\u002Fdiv>\u003Cpre class=\"shiki shiki-themes github-light github-dark\" style=\"--shiki-light:#24292e;--shiki-dark:#e1e4e8;--shiki-light-bg:#fff;--shiki-dark-bg:#24292e\" tabindex=\"0\">\u003Ccode class=\"language-text\">\u003Cspan class=\"line\">\u003Cspan>File\u003C\u002Fspan>\u003C\u002Fspan>\n\u003Cspan class=\"line\">\u003Cspan> └── Project Structure\u003C\u002Fspan>\u003C\u002Fspan>\u003C\u002Fcode>\u003C\u002Fpre>\n\u003C\u002Fdiv>\u003Cp>或者：\u003C\u002Fp>\n\u003Cdiv class=\"code-block-wrapper\">\u003Cdiv class=\"code-block-header\">\u003Cspan class=\"code-lang\">latex\u003C\u002Fspan>\u003Cbutton class=\"code-copy-btn\" data-code=\"Ctrl + Alt + Shift + S\n\" title=\"复制代码\">\u003Csvg xmlns=\"http:\u002F\u002Fwww.w3.org\u002F2000\u002Fsvg\" width=\"16\" height=\"16\" viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\">\u003Crect x=\"9\" y=\"9\" width=\"13\" height=\"13\" rx=\"2\" ry=\"2\"\u002F>\u003Cpath d=\"M5 15H4a2 2 0 0 1-2-2V4a2 2 0 0 1 2-2h9a2 2 0 0 1 2 2v1\"\u002F>\u003C\u002Fsvg>\u003C\u002Fbutton>\u003C\u002Fdiv>\u003Cpre class=\"shiki shiki-themes github-light github-dark\" style=\"--shiki-light:#24292e;--shiki-dark:#e1e4e8;--shiki-light-bg:#fff;--shiki-dark-bg:#24292e\" tabindex=\"0\">\u003Ccode class=\"language-text\">\u003Cspan class=\"line\">\u003Cspan>Ctrl + Alt + Shift + S\u003C\u002Fspan>\u003C\u002Fspan>\u003C\u002Fcode>\u003C\u002Fpre>\n\u003C\u002Fdiv>\u003Ch2 id=\"%E9%85%8D%E7%BD%AE%E9%A1%B9%E7%9B%AEjdk\" tabindex=\"-1\">\u003Ca class=\"header-anchor header-anchor\" href=\"#%E9%85%8D%E7%BD%AE%E9%A1%B9%E7%9B%AEjdk\" aria-hidden=\"true\">\u003C\u002Fa> 配置项目JDK\u003C\u002Fh2>\n\u003Cdiv class=\"code-block-wrapper\">\u003Cdiv class=\"code-block-header\">\u003Cspan class=\"code-lang\">latex\u003C\u002Fspan>\u003Cbutton class=\"code-copy-btn\" data-code=\"Project Structure\n └── Project\n      └── Project SDK\n\" title=\"复制代码\">\u003Csvg xmlns=\"http:\u002F\u002Fwww.w3.org\u002F2000\u002Fsvg\" width=\"16\" height=\"16\" viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\">\u003Crect x=\"9\" y=\"9\" width=\"13\" height=\"13\" rx=\"2\" ry=\"2\"\u002F>\u003Cpath d=\"M5 15H4a2 2 0 0 1-2-2V4a2 2 0 0 1 2-2h9a2 2 0 0 1 2 2v1\"\u002F>\u003C\u002Fsvg>\u003C\u002Fbutton>\u003C\u002Fdiv>\u003Cpre class=\"shiki shiki-themes github-light github-dark\" style=\"--shiki-light:#24292e;--shiki-dark:#e1e4e8;--shiki-light-bg:#fff;--shiki-dark-bg:#24292e\" tabindex=\"0\">\u003Ccode class=\"language-text\">\u003Cspan class=\"line\">\u003Cspan>Project Structure\u003C\u002Fspan>\u003C\u002Fspan>\n\u003Cspan class=\"line\">\u003Cspan> └── Project\u003C\u002Fspan>\u003C\u002Fspan>\n\u003Cspan class=\"line\">\u003Cspan>      └── Project SDK\u003C\u002Fspan>\u003C\u002Fspan>\u003C\u002Fcode>\u003C\u002Fpre>\n\u003C\u002Fdiv>\u003Cp>选择：\u003C\u002Fp>\n\u003Cdiv class=\"code-block-wrapper\">\u003Cdiv class=\"code-block-header\">\u003Cspan class=\"code-lang\">latex\u003C\u002Fspan>\u003Cbutton class=\"code-copy-btn\" data-code=\"JDK 21\n\" title=\"复制代码\">\u003Csvg xmlns=\"http:\u002F\u002Fwww.w3.org\u002F2000\u002Fsvg\" width=\"16\" height=\"16\" viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\">\u003Crect x=\"9\" y=\"9\" width=\"13\" height=\"13\" rx=\"2\" ry=\"2\"\u002F>\u003Cpath d=\"M5 15H4a2 2 0 0 1-2-2V4a2 2 0 0 1 2-2h9a2 2 0 0 1 2 2v1\"\u002F>\u003C\u002Fsvg>\u003C\u002Fbutton>\u003C\u002Fdiv>\u003Cpre class=\"shiki shiki-themes github-light github-dark\" style=\"--shiki-light:#24292e;--shiki-dark:#e1e4e8;--shiki-light-bg:#fff;--shiki-dark-bg:#24292e\" tabindex=\"0\">\u003Ccode class=\"language-text\">\u003Cspan class=\"line\">\u003Cspan>JDK 21\u003C\u002Fspan>\u003C\u002Fspan>\u003C\u002Fcode>\u003C\u002Fpre>\n\u003C\u002Fdiv>\u003Cp>点击：\u003C\u002Fp>\n\u003Cdiv class=\"code-block-wrapper\">\u003Cdiv class=\"code-block-header\">\u003Cspan class=\"code-lang\">latex\u003C\u002Fspan>\u003Cbutton class=\"code-copy-btn\" data-code=\"Apply\nOK\n\" title=\"复制代码\">\u003Csvg xmlns=\"http:\u002F\u002Fwww.w3.org\u002F2000\u002Fsvg\" width=\"16\" height=\"16\" viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\">\u003Crect x=\"9\" y=\"9\" width=\"13\" height=\"13\" rx=\"2\" ry=\"2\"\u002F>\u003Cpath d=\"M5 15H4a2 2 0 0 1-2-2V4a2 2 0 0 1 2-2h9a2 2 0 0 1 2 2v1\"\u002F>\u003C\u002Fsvg>\u003C\u002Fbutton>\u003C\u002Fdiv>\u003Cpre class=\"shiki shiki-themes github-light github-dark\" style=\"--shiki-light:#24292e;--shiki-dark:#e1e4e8;--shiki-light-bg:#fff;--shiki-dark-bg:#24292e\" tabindex=\"0\">\u003Ccode class=\"language-text\">\u003Cspan class=\"line\">\u003Cspan>Apply\u003C\u002Fspan>\u003C\u002Fspan>\n\u003Cspan class=\"line\">\u003Cspan>OK\u003C\u002Fspan>\u003C\u002Fspan>\u003C\u002Fcode>\u003C\u002Fpre>\n\u003C\u002Fdiv>\u003Cp>即可完成配置。\u003C\u002Fp>\n\u003Ch1 id=\"%E4%B8%83%E3%80%81%E8%BF%90%E8%A1%8C%E7%AC%AC%E4%B8%80%E4%B8%AAjava%E7%A8%8B%E5%BA%8F\" tabindex=\"-1\">\u003Ca class=\"header-anchor header-anchor\" href=\"#%E4%B8%83%E3%80%81%E8%BF%90%E8%A1%8C%E7%AC%AC%E4%B8%80%E4%B8%AAjava%E7%A8%8B%E5%BA%8F\" aria-hidden=\"true\">\u003C\u002Fa> 七、运行第一个java程序\u003C\u002Fh1>\n\u003Cp>创建文件HelloWorld.java：\u003C\u002Fp>\n\u003Cdiv class=\"code-block-wrapper\">\u003Cdiv class=\"code-block-header\">\u003Cspan class=\"code-lang\">java\u003C\u002Fspan>\u003Cbutton class=\"code-copy-btn\" data-code=\"public class Hello {\n\n    public static void main(String[] args) {\n        System.out.println("Hello MakeXu");\n    }\n\n}\n\" title=\"复制代码\">\u003Csvg xmlns=\"http:\u002F\u002Fwww.w3.org\u002F2000\u002Fsvg\" width=\"16\" height=\"16\" viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\">\u003Crect x=\"9\" y=\"9\" width=\"13\" height=\"13\" rx=\"2\" ry=\"2\"\u002F>\u003Cpath d=\"M5 15H4a2 2 0 0 1-2-2V4a2 2 0 0 1 2-2h9a2 2 0 0 1 2 2v1\"\u002F>\u003C\u002Fsvg>\u003C\u002Fbutton>\u003C\u002Fdiv>\u003Cpre class=\"shiki shiki-themes github-light github-dark\" style=\"--shiki-light:#24292e;--shiki-dark:#e1e4e8;--shiki-light-bg:#fff;--shiki-dark-bg:#24292e\" tabindex=\"0\">\u003Ccode class=\"language-java\">\u003Cspan class=\"line\">\u003Cspan style=\"--shiki-light:#D73A49;--shiki-dark:#F97583\">public\u003C\u002Fspan>\u003Cspan style=\"--shiki-light:#D73A49;--shiki-dark:#F97583\"> class\u003C\u002Fspan>\u003Cspan style=\"--shiki-light:#6F42C1;--shiki-dark:#B392F0\"> Hello\u003C\u002Fspan>\u003Cspan style=\"--shiki-light:#24292E;--shiki-dark:#E1E4E8\"> {\u003C\u002Fspan>\u003C\u002Fspan>\n\u003Cspan class=\"line\">\u003C\u002Fspan>\n\u003Cspan class=\"line\">\u003Cspan style=\"--shiki-light:#D73A49;--shiki-dark:#F97583\">    public\u003C\u002Fspan>\u003Cspan style=\"--shiki-light:#D73A49;--shiki-dark:#F97583\"> static\u003C\u002Fspan>\u003Cspan style=\"--shiki-light:#D73A49;--shiki-dark:#F97583\"> void\u003C\u002Fspan>\u003Cspan style=\"--shiki-light:#6F42C1;--shiki-dark:#B392F0\"> main\u003C\u002Fspan>\u003Cspan style=\"--shiki-light:#24292E;--shiki-dark:#E1E4E8\">(\u003C\u002Fspan>\u003Cspan style=\"--shiki-light:#D73A49;--shiki-dark:#F97583\">String\u003C\u002Fspan>\u003Cspan style=\"--shiki-light:#24292E;--shiki-dark:#E1E4E8\">[] \u003C\u002Fspan>\u003Cspan style=\"--shiki-light:#E36209;--shiki-dark:#FFAB70\">args\u003C\u002Fspan>\u003Cspan style=\"--shiki-light:#24292E;--shiki-dark:#E1E4E8\">) {\u003C\u002Fspan>\u003C\u002Fspan>\n\u003Cspan class=\"line\">\u003Cspan style=\"--shiki-light:#24292E;--shiki-dark:#E1E4E8\">        System.out.\u003C\u002Fspan>\u003Cspan style=\"--shiki-light:#6F42C1;--shiki-dark:#B392F0\">println\u003C\u002Fspan>\u003Cspan style=\"--shiki-light:#24292E;--shiki-dark:#E1E4E8\">(\u003C\u002Fspan>\u003Cspan style=\"--shiki-light:#032F62;--shiki-dark:#9ECBFF\">\"Hello MakeXu\"\u003C\u002Fspan>\u003Cspan style=\"--shiki-light:#24292E;--shiki-dark:#E1E4E8\">);\u003C\u002Fspan>\u003C\u002Fspan>\n\u003Cspan class=\"line\">\u003Cspan style=\"--shiki-light:#24292E;--shiki-dark:#E1E4E8\">    }\u003C\u002Fspan>\u003C\u002Fspan>\n\u003Cspan class=\"line\">\u003C\u002Fspan>\n\u003Cspan class=\"line\">\u003Cspan style=\"--shiki-light:#24292E;--shiki-dark:#E1E4E8\">}\u003C\u002Fspan>\u003C\u002Fspan>\u003C\u002Fcode>\u003C\u002Fpre>\n\u003C\u002Fdiv>\u003Ch2 id=\"%E7%BC%96%E8%AF%91\" tabindex=\"-1\">\u003Ca class=\"header-anchor header-anchor\" href=\"#%E7%BC%96%E8%AF%91\" aria-hidden=\"true\">\u003C\u002Fa> 编译\u003C\u002Fh2>\n\u003Cp>执行：\u003C\u002Fp>\n\u003Cdiv class=\"code-block-wrapper\">\u003Cdiv class=\"code-block-header\">\u003Cspan class=\"code-lang\">bash\u003C\u002Fspan>\u003Cbutton class=\"code-copy-btn\" data-code=\"javac Hello.java\n\" title=\"复制代码\">\u003Csvg xmlns=\"http:\u002F\u002Fwww.w3.org\u002F2000\u002Fsvg\" width=\"16\" height=\"16\" viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\">\u003Crect x=\"9\" y=\"9\" width=\"13\" height=\"13\" rx=\"2\" ry=\"2\"\u002F>\u003Cpath d=\"M5 15H4a2 2 0 0 1-2-2V4a2 2 0 0 1 2-2h9a2 2 0 0 1 2 2v1\"\u002F>\u003C\u002Fsvg>\u003C\u002Fbutton>\u003C\u002Fdiv>\u003Cpre class=\"shiki shiki-themes github-light github-dark\" style=\"--shiki-light:#24292e;--shiki-dark:#e1e4e8;--shiki-light-bg:#fff;--shiki-dark-bg:#24292e\" tabindex=\"0\">\u003Ccode class=\"language-bash\">\u003Cspan class=\"line\">\u003Cspan style=\"--shiki-light:#6F42C1;--shiki-dark:#B392F0\">javac\u003C\u002Fspan>\u003Cspan style=\"--shiki-light:#032F62;--shiki-dark:#9ECBFF\"> Hello.java\u003C\u002Fspan>\u003C\u002Fspan>\u003C\u002Fcode>\u003C\u002Fpre>\n\u003C\u002Fdiv>\u003Cp>生成：\u003C\u002Fp>\n\u003Cdiv class=\"code-block-wrapper\">\u003Cdiv class=\"code-block-header\">\u003Cspan class=\"code-lang\">latex\u003C\u002Fspan>\u003Cbutton class=\"code-copy-btn\" data-code=\"Hello.class\n\" title=\"复制代码\">\u003Csvg xmlns=\"http:\u002F\u002Fwww.w3.org\u002F2000\u002Fsvg\" width=\"16\" height=\"16\" viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\">\u003Crect x=\"9\" y=\"9\" width=\"13\" height=\"13\" rx=\"2\" ry=\"2\"\u002F>\u003Cpath d=\"M5 15H4a2 2 0 0 1-2-2V4a2 2 0 0 1 2-2h9a2 2 0 0 1 2 2v1\"\u002F>\u003C\u002Fsvg>\u003C\u002Fbutton>\u003C\u002Fdiv>\u003Cpre class=\"shiki shiki-themes github-light github-dark\" style=\"--shiki-light:#24292e;--shiki-dark:#e1e4e8;--shiki-light-bg:#fff;--shiki-dark-bg:#24292e\" tabindex=\"0\">\u003Ccode class=\"language-text\">\u003Cspan class=\"line\">\u003Cspan>Hello.class\u003C\u002Fspan>\u003C\u002Fspan>\u003C\u002Fcode>\u003C\u002Fpre>\n\u003C\u002Fdiv>\u003Ch2 id=\"%E8%BF%90%E8%A1%8C\" tabindex=\"-1\">\u003Ca class=\"header-anchor header-anchor\" href=\"#%E8%BF%90%E8%A1%8C\" aria-hidden=\"true\">\u003C\u002Fa> 运行\u003C\u002Fh2>\n\u003Cp>执行：\u003C\u002Fp>\n\u003Cdiv class=\"code-block-wrapper\">\u003Cdiv class=\"code-block-header\">\u003Cspan class=\"code-lang\">bash\u003C\u002Fspan>\u003Cbutton class=\"code-copy-btn\" data-code=\"java Hello\n\" title=\"复制代码\">\u003Csvg xmlns=\"http:\u002F\u002Fwww.w3.org\u002F2000\u002Fsvg\" width=\"16\" height=\"16\" viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\">\u003Crect x=\"9\" y=\"9\" width=\"13\" height=\"13\" rx=\"2\" ry=\"2\"\u002F>\u003Cpath d=\"M5 15H4a2 2 0 0 1-2-2V4a2 2 0 0 1 2-2h9a2 2 0 0 1 2 2v1\"\u002F>\u003C\u002Fsvg>\u003C\u002Fbutton>\u003C\u002Fdiv>\u003Cpre class=\"shiki shiki-themes github-light github-dark\" style=\"--shiki-light:#24292e;--shiki-dark:#e1e4e8;--shiki-light-bg:#fff;--shiki-dark-bg:#24292e\" tabindex=\"0\">\u003Ccode class=\"language-bash\">\u003Cspan class=\"line\">\u003Cspan style=\"--shiki-light:#6F42C1;--shiki-dark:#B392F0\">java\u003C\u002Fspan>\u003Cspan style=\"--shiki-light:#032F62;--shiki-dark:#9ECBFF\"> Hello\u003C\u002Fspan>\u003C\u002Fspan>\u003C\u002Fcode>\u003C\u002Fpre>\n\u003C\u002Fdiv>\u003Cp>输出：\u003C\u002Fp>\n\u003Cdiv class=\"code-block-wrapper\">\u003Cdiv class=\"code-block-header\">\u003Cspan class=\"code-lang\">latex\u003C\u002Fspan>\u003Cbutton class=\"code-copy-btn\" data-code=\"Hello MakeXu\n\" title=\"复制代码\">\u003Csvg xmlns=\"http:\u002F\u002Fwww.w3.org\u002F2000\u002Fsvg\" width=\"16\" height=\"16\" viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\">\u003Crect x=\"9\" y=\"9\" width=\"13\" height=\"13\" rx=\"2\" ry=\"2\"\u002F>\u003Cpath d=\"M5 15H4a2 2 0 0 1-2-2V4a2 2 0 0 1 2-2h9a2 2 0 0 1 2 2v1\"\u002F>\u003C\u002Fsvg>\u003C\u002Fbutton>\u003C\u002Fdiv>\u003Cpre class=\"shiki shiki-themes github-light github-dark\" style=\"--shiki-light:#24292e;--shiki-dark:#e1e4e8;--shiki-light-bg:#fff;--shiki-dark-bg:#24292e\" tabindex=\"0\">\u003Ccode class=\"language-text\">\u003Cspan class=\"line\">\u003Cspan>Hello MakeXu\u003C\u002Fspan>\u003C\u002Fspan>\u003C\u002Fcode>\u003C\u002Fpre>\n\u003C\u002Fdiv>\u003Cblockquote>\n\u003Cp>tips:\u003C\u002Fp>\n\u003Cp>先进入程序目录 再执行命令\u003C\u002Fp>\n\u003Cp>javac Hello.java 命令需要java后缀\u003C\u002Fp>\n\u003Cp>java Hello 命令不用class后缀\u003C\u002Fp>\n\u003Cp>jdk11之后可以省略javac  直接java\u003C\u002Fp>\n\u003C\u002Fblockquote>\n\u003Ch1 id=\"%E5%85%AB%E3%80%81%E5%B8%B8%E7%94%A8jdk%E5%91%BD%E4%BB%A4\" tabindex=\"-1\">\u003Ca class=\"header-anchor header-anchor\" href=\"#%E5%85%AB%E3%80%81%E5%B8%B8%E7%94%A8jdk%E5%91%BD%E4%BB%A4\" aria-hidden=\"true\">\u003C\u002Fa> 八、常用JDK命令\u003C\u002Fh1>\n\u003Cdiv class=\"code-block-wrapper\">\u003Cdiv class=\"code-block-header\">\u003Cspan class=\"code-lang\">bash\u003C\u002Fspan>\u003Cbutton class=\"code-copy-btn\" data-code=\"# 查看版本\njava -version\n\n查看编译器版本\njavac -version\n\n# 编译Java程序\njavac Hello.java\n\n#运行Java程序\njava Hello\n\" title=\"复制代码\">\u003Csvg xmlns=\"http:\u002F\u002Fwww.w3.org\u002F2000\u002Fsvg\" width=\"16\" height=\"16\" viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\">\u003Crect x=\"9\" y=\"9\" width=\"13\" height=\"13\" rx=\"2\" ry=\"2\"\u002F>\u003Cpath d=\"M5 15H4a2 2 0 0 1-2-2V4a2 2 0 0 1 2-2h9a2 2 0 0 1 2 2v1\"\u002F>\u003C\u002Fsvg>\u003C\u002Fbutton>\u003C\u002Fdiv>\u003Cpre class=\"shiki shiki-themes github-light github-dark\" style=\"--shiki-light:#24292e;--shiki-dark:#e1e4e8;--shiki-light-bg:#fff;--shiki-dark-bg:#24292e\" tabindex=\"0\">\u003Ccode class=\"language-bash\">\u003Cspan class=\"line\">\u003Cspan style=\"--shiki-light:#6A737D;--shiki-dark:#6A737D\"># 查看版本\u003C\u002Fspan>\u003C\u002Fspan>\n\u003Cspan class=\"line\">\u003Cspan style=\"--shiki-light:#6F42C1;--shiki-dark:#B392F0\">java\u003C\u002Fspan>\u003Cspan style=\"--shiki-light:#005CC5;--shiki-dark:#79B8FF\"> -version\u003C\u002Fspan>\u003C\u002Fspan>\n\u003Cspan class=\"line\">\u003C\u002Fspan>\n\u003Cspan class=\"line\">\u003Cspan style=\"--shiki-light:#6F42C1;--shiki-dark:#B392F0\">查看编译器版本\u003C\u002Fspan>\u003C\u002Fspan>\n\u003Cspan class=\"line\">\u003Cspan style=\"--shiki-light:#6F42C1;--shiki-dark:#B392F0\">javac\u003C\u002Fspan>\u003Cspan style=\"--shiki-light:#005CC5;--shiki-dark:#79B8FF\"> -version\u003C\u002Fspan>\u003C\u002Fspan>\n\u003Cspan class=\"line\">\u003C\u002Fspan>\n\u003Cspan class=\"line\">\u003Cspan style=\"--shiki-light:#6A737D;--shiki-dark:#6A737D\"># 编译Java程序\u003C\u002Fspan>\u003C\u002Fspan>\n\u003Cspan class=\"line\">\u003Cspan style=\"--shiki-light:#6F42C1;--shiki-dark:#B392F0\">javac\u003C\u002Fspan>\u003Cspan style=\"--shiki-light:#032F62;--shiki-dark:#9ECBFF\"> Hello.java\u003C\u002Fspan>\u003C\u002Fspan>\n\u003Cspan class=\"line\">\u003C\u002Fspan>\n\u003Cspan class=\"line\">\u003Cspan style=\"--shiki-light:#6A737D;--shiki-dark:#6A737D\">#运行Java程序\u003C\u002Fspan>\u003C\u002Fspan>\n\u003Cspan class=\"line\">\u003Cspan style=\"--shiki-light:#6F42C1;--shiki-dark:#B392F0\">java\u003C\u002Fspan>\u003Cspan style=\"--shiki-light:#032F62;--shiki-dark:#9ECBFF\"> Hello\u003C\u002Fspan>\u003C\u002Fspan>\u003C\u002Fcode>\u003C\u002Fpre>\n\u003C\u002Fdiv>\u003Ch1 id=\"%E4%B9%9D%E3%80%81%E5%B8%B8%E8%A7%81%E9%97%AE%E9%A2%98\" tabindex=\"-1\">\u003Ca class=\"header-anchor header-anchor\" href=\"#%E4%B9%9D%E3%80%81%E5%B8%B8%E8%A7%81%E9%97%AE%E9%A2%98\" aria-hidden=\"true\">\u003C\u002Fa> 九、常见问题\u003C\u002Fh1>\n\u003Cblockquote>\n\u003Cp>根据同学反馈会一直更新常见问题\u003C\u002Fp>\n\u003C\u002Fblockquote>\n\u003Ch2 id=\"1%E3%80%81-%E5%AE%89%E8%A3%85-jdk-%E5%90%8E%E6%8F%90%E7%A4%BA%E2%80%9C%E4%B8%8D%E6%98%AF%E5%86%85%E9%83%A8%E6%88%96%E5%A4%96%E9%83%A8%E5%91%BD%E4%BB%A4%E2%80%9D\" tabindex=\"-1\">\u003Ca class=\"header-anchor header-anchor\" href=\"#1%E3%80%81-%E5%AE%89%E8%A3%85-jdk-%E5%90%8E%E6%8F%90%E7%A4%BA%E2%80%9C%E4%B8%8D%E6%98%AF%E5%86%85%E9%83%A8%E6%88%96%E5%A4%96%E9%83%A8%E5%91%BD%E4%BB%A4%E2%80%9D\" aria-hidden=\"true\">\u003C\u002Fa> 1、 安装 JDK 后提示“不是内部或外部命令”\u003C\u002Fh2>\n\u003Cp>环境变量配置错误。检查JAVA_HOME是否正确配置并且确保在path中的顺序靠前。\u003C\u002Fp>\n",[184,215,241,255],{"id":185,"name":186,"slug":187,"categoryId":38,"category":39,"categoryColor":40,"imageUrl":188,"summary":189,"sortNum":78,"status":43,"viewCount":190,"downloadCount":191,"favoriteCount":46,"likeCount":46,"tutorialCount":47,"videoCount":47,"articles":47,"videos":47,"versions":192,"tags":207},"4","Maven","maven","https:\u002F\u002Fthomas-coding-pub.oss-cn-hangzhou.aliyuncs.com\u002Fimage\u002F744e3f488f4948db96d113033ff7e505.jpeg","Maven 是 Apache 提供的项目管理和构建工具，通过统一的项目结构和依赖管理机制，实现 Java 项目的编译、测试、打包、部署等自动化管理。","638","147",[193],{"id":194,"toolId":185,"versionName":195,"sortNum":4,"status":43,"downloads":196},"2079421047062671362","Maven 3.9.16",[197,201,205],{"id":198,"versionId":194,"platform":65,"fileName":199,"diskType":67,"downloadUrl":200,"extractCode":7,"sortNum":4},"2079421934749364226","apache-maven-3.9.16-bin.zip","https:\u002F\u002Fpan.quark.cn\u002Fs\u002Fe6fc4c5bd5ce",{"id":202,"versionId":194,"platform":75,"fileName":203,"diskType":67,"downloadUrl":204,"extractCode":7,"sortNum":43},"2079422694832746498","apache-maven-3.9.16-bin.tar.gz","https:\u002F\u002Fpan.quark.cn\u002Fs\u002F86f21099cf71",{"id":206,"versionId":194,"platform":86,"fileName":203,"diskType":67,"downloadUrl":204,"extractCode":7,"sortNum":78},"2079422695323480066",[208,209,212],{"id":157,"name":158,"color":159,"sortNum":4,"status":43},{"id":210,"name":211,"color":40,"sortNum":4,"status":43},"2070360509309087746","项目构建",{"id":213,"name":214,"color":40,"sortNum":4,"status":43},"2070360484906627073","依赖管理",{"id":216,"name":217,"slug":218,"categoryId":38,"category":39,"categoryColor":40,"imageUrl":219,"summary":220,"sortNum":94,"status":43,"viewCount":221,"downloadCount":222,"favoriteCount":46,"likeCount":46,"tutorialCount":47,"videoCount":47,"articles":47,"videos":47,"versions":223,"tags":236},"5","Node.js","nodejs","https:\u002F\u002Fthomas-coding-pub.oss-cn-hangzhou.aliyuncs.com\u002Fimage\u002F6a463eb8b03c753d225c6430.png","JavaScript运行环境，前端项目开发必备，内置npm包管理器。","480","89",[224],{"id":225,"toolId":216,"versionName":226,"sortNum":4,"status":43,"downloads":227},"2079549766771159042","Node.js 24",[228,232],{"id":229,"versionId":225,"platform":65,"fileName":230,"diskType":67,"downloadUrl":231,"extractCode":7,"sortNum":4},"2079550010669936642","node-v24.18.0-win-x64.zip","https:\u002F\u002Fpan.quark.cn\u002Fs\u002F1ea5f8a2246a",{"id":233,"versionId":225,"platform":65,"fileName":234,"diskType":67,"downloadUrl":235,"extractCode":7,"sortNum":43},"2079550010992898050","node-v24.18.0-x64.msi","https:\u002F\u002Fpan.quark.cn\u002Fs\u002F713cce9c0478",[237],{"id":238,"name":239,"color":240,"sortNum":4,"status":43},"2066782281264795649","前端开发","#f97316",{"id":242,"name":243,"slug":244,"categoryId":38,"category":39,"categoryColor":40,"imageUrl":245,"summary":246,"sortNum":247,"status":43,"viewCount":248,"downloadCount":46,"favoriteCount":46,"likeCount":46,"tutorialCount":47,"videoCount":47,"articles":47,"videos":47,"versions":249,"tags":250},"2070346756928663553","Tomcat","tomcat","https:\u002F\u002Fthomas-coding-pub.oss-cn-hangzhou.aliyuncs.com\u002Fimage\u002F6a463e86b03c753d225c642b.png","Tomcat 是 Apache 开源的 Java Web 应用服务器，用于部署、运行和管理 Servlet、JSP 及 Java Web 应用程序。",9,"56",[],[251,252],{"id":157,"name":158,"color":159,"sortNum":4,"status":43},{"id":253,"name":254,"color":40,"sortNum":4,"status":43},"2070357524684304386","Web服务器",{"id":256,"name":257,"slug":258,"categoryId":38,"category":39,"categoryColor":40,"imageUrl":259,"summary":260,"sortNum":261,"status":43,"viewCount":262,"downloadCount":46,"favoriteCount":46,"likeCount":46,"tutorialCount":47,"videoCount":47,"articles":47,"videos":47,"versions":263,"tags":264},"9","Open JDK ( Amazon Corretto )","amazon-corretto","https:\u002F\u002Fthomas-coding-pub.oss-cn-hangzhou.aliyuncs.com\u002Fimage\u002Ff0e58c0ccc264c568803999fd7f5e3b2.png","Amazon Corretto 是开放 Java 开发工具包 (OpenJDK) 的免费、多平台、生产就绪型发行版。Corretto 提供长期支持，其中包括性能增强和安全修复。亚马逊在内部的数千种生产服务上运行 Corretto，并且 Corretto 已被证明能够兼容 Java SE 标准。借助 Corretto，您可以在常用操作系统（包括 Linux、Windows 和 macOS）上开发和运行 Java 应用程序。",20,"27",[],[265],{"id":157,"name":158,"color":159,"sortNum":4,"status":43}]