当前位置:首页>下载安装>【JDK 19】JDK 19软件安装包下载JDK 软件含激活步骤 + 完整流程

【JDK 19】JDK 19软件安装包下载JDK 软件含激活步骤 + 完整流程

  • 2026-08-15 19:11:01
【JDK 19】JDK 19软件安装包下载JDK 软件含激活步骤 + 完整流程

JDK (全版本)安装包下载链接:

百度网盘

https://pan.baidu.com/s/11ntDXmwitIKeHwauLBU9aw?pwd=8888

夸克网盘

https://pan.quark.cn/s/3aceb52e7c11

123云盘

https://www.123912.com/s/j5j1jv-T3dTH

所有软件均为压缩文件,务必使用解压缩软件解压后再进行安装,不解压直接进行安装会导致安装失败。

如遇链接失效,点击公众号菜单栏【最新链接】,即可获取最新的下载链接

安装步骤

1、将安装包进行解压

2.点如下图程序开始运行

3点下一步

4、点下一步

5、安装中,请等待

6、 点关闭

7 找到此电脑,然后右击属性

 8、点高级系统设置

 9.点环境变量

10.点新建

11.变量名输入JAVA_HOME,输入(第4步)jdk的安装路径,提示:JDK安装路径是C:\Program Files\Java\jdk-19然后点击确定

2.点新建

13.变量名输入PATH变量值输入%JAVA_HOME%\bin最后点击确定

14.点新建

15.变量名输入PATH变量值输入%JAVA_HOME%\jre\bin最后点击确定

16.点确定

17.点确定

18.按下键盘上的快捷键win+r输入cmd然后点击确定

19.输入java -version并按下键盘上的回车键得到jdk的安装版本。提示:-version前面有个空格。

20.输入java然后按键盘上面的回车键, 得到下面的信息

21.输入javac然后按键盘上面的回车键,得到下面的信息

但凡学Java编程、做后端开发的同学,第一次搭环境肯定都装过JDK。我不整那些晦涩的开发工具包定义,就直白跟大家唠明白它到底干啥用。说白了它就是Java程序的运行基础环境,没有它,你电脑上所有Java代码都跑不起来。不管是用记事本手写代码,还是用IDEA、Eclipse这些软件写项目,底层全都靠JDK支撑。简单说,写代码、编译文件、运行程序、调试报错,全都离不开它,是学Java最基础、最刚需的工具,没有任何平替。

说实话,我第一次装JDK配置环境的时候,真的彻底懵圈,折腾得头都大了。之前我一直以为装编程软件都是下一步安装就行,没啥技术含量。

结果JDK完全不一样,装完本体还得手动配环境变量。我刚开始啥也不懂,随便找个安装包瞎装,路径乱选,环境变量也随便填。装好之后打开cmd测试,一直提示命令无效,死活识别不到版本。最简单的hello代码编译失败,反复重装了三四遍,问题依旧解决不了。折腾一整个晚上,连最基础的运行环境都没搭好,当时真的特别崩溃,觉得学Java的门槛也太高了,光配环境就劝退大半新人。

后来大二做Java课程设计,我才认认真真把JDK的配置和用法摸透。那次课设需要做完整的小型管理系统,代码量不小,还得保证程序能正常编译运行、稳定调试。老师明确要求必须手动搭建JDK环境,不能直接用IDE自带的简易环境,就是为了让我们吃透基础。没办法只能一点点对照教程排查,慢慢弄懂安装路径、环境变量配置、版本匹配这些关键细节,终于把环境搭通,后续写代码、做项目才顺利起来。

我身边好多初学Java的同学,全都在JDK这里踩过巨多坑。很多人盲目装最新版本,结果学校教学、课设要求是旧版本,版本不兼容导致代码报错、项目无法运行。还有人安装路径带中文、空格,看着装好了,实际全程识别异常。最常见的就是环境变量配置出错,少写符号、输错路径,忙活半天代码跑不起来,白白浪费超多时间。

用久了之后我真心觉得,JDK是那种看似不起眼,实则至关重要的底层工具。它没有花里胡哨的界面,后台默默支撑所有Java程序运行,稳定度特别高。只要环境配置到位,后续写代码、编译调试、运行项目基本不会出底层问题。而且适配性很强,不管是课堂基础作业、期末课设,还是简单的实战小项目,通用的JDK版本都能完美适配。唯一的缺点就是新手配置门槛高,细节超多,错一点就全盘翻车。

我跟你们说,新手用JDK的坑,我基本全中招,都是实打实的血泪教训。很多新手最大的误区,就是觉得版本越新越好,盲目跟风装最新版,结果和教材、课堂项目不兼容,各种奇怪报错。

还有超多同学装完之后不测试,直接开始写代码,写到最后才发现环境没配好,所有代码都没法编译。我之前踩过一个很蠢的坑,修改环境变量之后没重启工具,一直用旧配置运行,反复排查代码错误,最后才发现是配置没生效,白白浪费大半天时间。还有人随意更改安装文件夹名称,导致系统路径失效,环境直接报废。

分享几个我自己慢慢摸索出来的新手干货,都是学生党实打实能用的小技巧,一点不花哨。新手真的不用研究复杂的底层源码、环境原理,把版本选择、干净安装、环境变量配置、后期测试这几项练熟,应付大学所有Java作业和课设完全足够。

初学优先选课堂统一的版本,别盲目装新版,兼容性最稳。安装路径一定要纯英文,不要带中文、空格和特殊符号。配置完环境变量,一定要重启软件和cmd再测试。不要随意改动安装目录和文件夹名称。第一次搭好环境可以备份配置,后续出问题能快速修复。

真心觉得JDK是学Java的敲门砖,看似简单实则细节满满。虽然新手配置阶段特别磨人,很容易心态炸裂,但只要一次搭好、吃透规则,后续所有编程学习都会顺畅超多。避开这些基础小误区,认真核对每一步,不管是日常编程练习、期末课设,还是入门实战项目,都能稳稳拿捏。

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  1. CONNECT:[ UseTime:0.000975s ] mysql:host=127.0.0.1;port=3306;dbname=no_yeyulingfeng;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.001277s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.004094s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.002062s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.001289s ]
  6. SELECT * FROM `set` [ RunTime:0.008907s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.001417s ]
  8. SELECT * FROM `article` WHERE `id` = 488207 LIMIT 1 [ RunTime:0.015450s ]
  9. UPDATE `article` SET `lasttime` = 1786834513 WHERE `id` = 488207 [ RunTime:0.016062s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 65 LIMIT 1 [ RunTime:0.021539s ]
  11. SELECT * FROM `article` WHERE `id` < 488207 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.001199s ]
  12. SELECT * FROM `article` WHERE `id` > 488207 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.016154s ]
  13. SELECT * FROM `article` WHERE `id` < 488207 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.002710s ]
  14. SELECT * FROM `article` WHERE `id` < 488207 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.077046s ]
  15. SELECT * FROM `article` WHERE `id` < 488207 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.003237s ]
0.298880s