昨天重装了系统，马上就要走出社会上班了，打算好好捡起以前学过的知识。今天上午装了JAVA开发环境需要的包和软件，特意在此记录一下，真的真的，每次都忘记，然后上网各种找教程，头大。其实网上各种教程，但还是记录一下，以后也不愁啦。
首先，需要下载JAVA开发环境需要的JDK。这里我是在官网下载的jdk-8u251-windows 64位，具体下载32位还是64位需要根据系统来定。官网下载需要登录oracle，个人觉得有点麻烦，我登录了好几遍才下载下来，后面附上我分享的百度网盘链接，有需要的可以自取哈。由于我已经安装过了，具体安装过程和环境变量配置推荐参考这位博主的分享：https://blog.csdn.net/qq_39720249/article/details/80721719
这里重点记录一下安装IDEA的激活过程，我下载安装的是IDEA 2019.2.4版本，同样后面会给出链接。激活IDEA，如果是第一次使用，选择试用 Evaluate for free。进入软件后随便创建一个工程。然后点击上方导航栏Help下拉框的Edit Custom VM Options，如图1,并在文件最后一行新增补丁位置，如图2所示。
图1
图2
再点击Help->Register，选择Active Code方式激活，在框内填写激活码，点OK确定，如图3。这里我用的激活码如下：
3AGXEJXFK9-eyJsaWNlbnNlSWQiOiIzQUdYRUpYRks5IiwibGljZW5zZWVOYW1lIjoiaHR0cHM6Ly96aGlsZS5pbyIsImFzc2lnbmVlTmFtZSI6IiIsImFzc2lnbmVlRW1haWwiOiIiLCJsaWNlbnNlUmVzdHJpY3Rpb24iOiIiLCJjaGVja0NvbmN1cnJlbnRVc2UiOmZhbHNlLCJwcm9kdWN0cyI6W3siY29kZSI6IklJIiwiZmFsbGJhY2tEYXRlIjoiMjA4OS0wNy0wNyIsInBhaWRVcFRvIjoiMjA4OS0wNy0wNyJ9LHsiY29kZSI6IkFDIiwiZmFsbGJhY2tEYXRlIjoiMjA4OS0wNy0wNyIsInBhaWRVcFRvIjoiMjA4OS0wNy0wNyJ9LHsiY29kZSI6IkRQTiIsImZhbGxiYWNrRGF0ZSI6IjIwODktMDctMDciLCJwYWlkVXBUbyI6IjIwODktMDctMDcifSx7ImNvZGUiOiJQUyIsImZhbGxiYWNrRGF0ZSI6IjIwODktMDctMDciLCJwYWlkVXBUbyI6IjIwODktMDctMDcifSx7ImNvZGUiOiJHTyIsImZhbGxiYWNrRGF0ZSI6IjIwODktMDctMDciLCJwYWlkVXBUbyI6IjIwODktMDctMDcifSx7ImNvZGUiOiJETSIsImZhbGxiYWNrRGF0ZSI6IjIwODktMDctMDciLCJwYWlkVXBUbyI6IjIwODktMDctMDcifSx7ImNvZGUiOiJDTCIsImZhbGxiYWNrRGF0ZSI6IjIwODktMDctMDciLCJwYWlkVXBUbyI6IjIwODktMDctMDcifSx7ImNvZGUiOiJSUzAiLCJmYWxsYmFja0RhdGUiOiIyMDg5LTA3LTA3IiwicGFpZFVwVG8iOiIyMDg5LTA3LTA3In0seyJjb2RlIjoiUkMiLCJmYWxsYmFja0RhdGUiOiIyMDg5LTA3LTA3IiwicGFpZFVwVG8iOiIyMDg5LTA3LTA3In0seyJjb2RlIjoiUkQiLCJmYWxsYmFja0RhdGUiOiIyMDg5LTA3LTA3IiwicGFpZFVwVG8iOiIyMDg5LTA3LTA3In0seyJjb2RlIjoiUEMiLCJmYWxsYmFja0RhdGUiOiIyMDg5LTA3LTA3IiwicGFpZFVwVG8iOiIyMDg5LTA3LTA3In0seyJjb2RlIjoiUk0iLCJmYWxsYmFja0RhdGUiOiIyMDg5LTA3LTA3IiwicGFpZFVwVG8iOiIyMDg5LTA3LTA3In0seyJjb2RlIjoiV1MiLCJmYWxsYmFja0RhdGUiOiIyMDg5LTA3LTA3IiwicGFpZFVwVG8iOiIyMDg5LTA3LTA3In0seyJjb2RlIjoiREIiLCJmYWxsYmFja0RhdGUiOiIyMDg5LTA3LTA3IiwicGFpZFVwVG8iOiIyMDg5LTA3LTA3In0seyJjb2RlIjoiREMiLCJmYWxsYmFja0RhdGUiOiIyMDg5LTA3LTA3IiwicGFpZFVwVG8iOiIyMDg5LTA3LTA3In0seyJjb2RlIjoiUlNVIiwiZmFsbGJhY2tEYXRlIjoiMjA4OS0wNy0wNyIsInBhaWRVcFRvIjoiMjA4OS0wNy0wNyJ9XSwiaGFzaCI6IjEyNzk2ODc3LzAiLCJncmFjZVBlcmlvZERheXMiOjcsImF1dG9Qcm9sb25nYXRlZCI6ZmFsc2UsImlzQXV0b1Byb2xvbmdhdGVkIjpmYWxzZX0=-WGTHs6XpDhr+uumvbwQPOdlxWnQwgnGaL4eRnlpGKApEEkJyYvNEuPWBSrQkPmVpim/8Sab6HV04Dw3IzkJT0yTc29sPEXBf69+7y6Jv718FaJu4MWfsAk/ZGtNIUOczUQ0iGKKnSSsfQ/3UoMv0q/yJcfvj+me5Zd/gfaisCCMUaGjB/lWIPpEPzblDtVJbRexB1MALrLCEoDv3ujcPAZ7xWb54DiZwjYhQvQ+CvpNNF2jeTku7lbm5v+BoDsdeRq7YBt9ANLUKPr2DahcaZ4gctpHZXhG96IyKx232jYq9jQrFDbQMtVr3E+GsCekMEWSD//dLT+HuZdc1sAIYrw==-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
图3
最后重启软件，就可以看到被激活了，直到2089年才过期。
这里记录一下，不知道是激活码问题还是其他什么原因，在添加了补丁位置后，激活页面输入激活码，一直提示key not valid，大概是这个，就是key无效的意思，OK按钮也是灰色的。我重新启动软件之后再试又好了，特别记录一下，虽然具体原因我也没搞清楚。好啦，我要开始学JAVA 啦~
JDK8下载链接：https://pan.baidu.com/s/1jyOkHmDtcWPaN9aubIb2nQ
提取码：w7ss
IDEA的下载链接：https://pan.baidu.com/s/15BsmRdTfEpUJcLgmFSG7Kw
提取码：qtmz
补丁下载链接：https://pan.baidu.com/s/1XcW5jS6GuRILDWpiiMtA3g
提取码：09em