昨天重裝了系統，馬上就要走出社會上班了，打算好好撿起以前學過的知識。今天上午裝了JAVA開發環境需要的包和軟件，特意在此記錄一下，真的真的，每次都忘記，然后上網各種找教程，頭大。其實網上各種教程，但還是記錄一下，以后也不愁啦。
首先，需要下載JAVA開發環境需要的JDK。這里我是在官網下載的jdk-8u251-windows 64位，具體下載32位還是64位需要根據系統來定。官網下載需要登錄oracle，個人覺得有點麻煩，我登錄了好幾遍才下載下來，后面附上我分享的百度網盤鏈接，有需要的可以自取哈。由於我已經安裝過了，具體安裝過程和環境變量配置推薦參考這位博主的分享：https://blog.csdn.net/qq_39720249/article/details/80721719
這里重點記錄一下安裝IDEA的激活過程，我下載安裝的是IDEA 2019.2.4版本，同樣后面會給出鏈接。激活IDEA，如果是第一次使用，選擇試用 Evaluate for free。進入軟件后隨便創建一個工程。然后點擊上方導航欄Help下拉框的Edit Custom VM Options，如圖1,並在文件最后一行新增補丁位置，如圖2所示。
圖1
圖2
再點擊Help->Register，選擇Active Code方式激活，在框內填寫激活碼，點OK確定，如圖3。這里我用的激活碼如下：
3AGXEJXFK9-eyJsaWNlbnNlSWQiOiIzQUdYRUpYRks5IiwibGljZW5zZWVOYW1lIjoiaHR0cHM6Ly96aGlsZS5pbyIsImFzc2lnbmVlTmFtZSI6IiIsImFzc2lnbmVlRW1haWwiOiIiLCJsaWNlbnNlUmVzdHJpY3Rpb24iOiIiLCJjaGVja0NvbmN1cnJlbnRVc2UiOmZhbHNlLCJwcm9kdWN0cyI6W3siY29kZSI6IklJIiwiZmFsbGJhY2tEYXRlIjoiMjA4OS0wNy0wNyIsInBhaWRVcFRvIjoiMjA4OS0wNy0wNyJ9LHsiY29kZSI6IkFDIiwiZmFsbGJhY2tEYXRlIjoiMjA4OS0wNy0wNyIsInBhaWRVcFRvIjoiMjA4OS0wNy0wNyJ9LHsiY29kZSI6IkRQTiIsImZhbGxiYWNrRGF0ZSI6IjIwODktMDctMDciLCJwYWlkVXBUbyI6IjIwODktMDctMDcifSx7ImNvZGUiOiJQUyIsImZhbGxiYWNrRGF0ZSI6IjIwODktMDctMDciLCJwYWlkVXBUbyI6IjIwODktMDctMDcifSx7ImNvZGUiOiJHTyIsImZhbGxiYWNrRGF0ZSI6IjIwODktMDctMDciLCJwYWlkVXBUbyI6IjIwODktMDctMDcifSx7ImNvZGUiOiJETSIsImZhbGxiYWNrRGF0ZSI6IjIwODktMDctMDciLCJwYWlkVXBUbyI6IjIwODktMDctMDcifSx7ImNvZGUiOiJDTCIsImZhbGxiYWNrRGF0ZSI6IjIwODktMDctMDciLCJwYWlkVXBUbyI6IjIwODktMDctMDcifSx7ImNvZGUiOiJSUzAiLCJmYWxsYmFja0RhdGUiOiIyMDg5LTA3LTA3IiwicGFpZFVwVG8iOiIyMDg5LTA3LTA3In0seyJjb2RlIjoiUkMiLCJmYWxsYmFja0RhdGUiOiIyMDg5LTA3LTA3IiwicGFpZFVwVG8iOiIyMDg5LTA3LTA3In0seyJjb2RlIjoiUkQiLCJmYWxsYmFja0RhdGUiOiIyMDg5LTA3LTA3IiwicGFpZFVwVG8iOiIyMDg5LTA3LTA3In0seyJjb2RlIjoiUEMiLCJmYWxsYmFja0RhdGUiOiIyMDg5LTA3LTA3IiwicGFpZFVwVG8iOiIyMDg5LTA3LTA3In0seyJjb2RlIjoiUk0iLCJmYWxsYmFja0RhdGUiOiIyMDg5LTA3LTA3IiwicGFpZFVwVG8iOiIyMDg5LTA3LTA3In0seyJjb2RlIjoiV1MiLCJmYWxsYmFja0RhdGUiOiIyMDg5LTA3LTA3IiwicGFpZFVwVG8iOiIyMDg5LTA3LTA3In0seyJjb2RlIjoiREIiLCJmYWxsYmFja0RhdGUiOiIyMDg5LTA3LTA3IiwicGFpZFVwVG8iOiIyMDg5LTA3LTA3In0seyJjb2RlIjoiREMiLCJmYWxsYmFja0RhdGUiOiIyMDg5LTA3LTA3IiwicGFpZFVwVG8iOiIyMDg5LTA3LTA3In0seyJjb2RlIjoiUlNVIiwiZmFsbGJhY2tEYXRlIjoiMjA4OS0wNy0wNyIsInBhaWRVcFRvIjoiMjA4OS0wNy0wNyJ9XSwiaGFzaCI6IjEyNzk2ODc3LzAiLCJncmFjZVBlcmlvZERheXMiOjcsImF1dG9Qcm9sb25nYXRlZCI6ZmFsc2UsImlzQXV0b1Byb2xvbmdhdGVkIjpmYWxzZX0=-WGTHs6XpDhr+uumvbwQPOdlxWnQwgnGaL4eRnlpGKApEEkJyYvNEuPWBSrQkPmVpim/8Sab6HV04Dw3IzkJT0yTc29sPEXBf69+7y6Jv718FaJu4MWfsAk/ZGtNIUOczUQ0iGKKnSSsfQ/3UoMv0q/yJcfvj+me5Zd/gfaisCCMUaGjB/lWIPpEPzblDtVJbRexB1MALrLCEoDv3ujcPAZ7xWb54DiZwjYhQvQ+CvpNNF2jeTku7lbm5v+BoDsdeRq7YBt9ANLUKPr2DahcaZ4gctpHZXhG96IyKx232jYq9jQrFDbQMtVr3E+GsCekMEWSD//dLT+HuZdc1sAIYrw==-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
圖3
最后重啟軟件，就可以看到被激活了，直到2089年才過期。
這里記錄一下，不知道是激活碼問題還是其他什么原因，在添加了補丁位置后，激活頁面輸入激活碼，一直提示key not valid，大概是這個，就是key無效的意思，OK按鈕也是灰色的。我重新啟動軟件之后再試又好了，特別記錄一下，雖然具體原因我也沒搞清楚。好啦，我要開始學JAVA 啦~
JDK8下載鏈接：https://pan.baidu.com/s/1jyOkHmDtcWPaN9aubIb2nQ
提取碼：w7ss
IDEA的下載鏈接：https://pan.baidu.com/s/15BsmRdTfEpUJcLgmFSG7Kw
提取碼：qtmz
補丁下載鏈接：https://pan.baidu.com/s/1XcW5jS6GuRILDWpiiMtA3g
提取碼：09em