PS C:\Users\Aaryan> kotlin -version
'java' is not recognized as an internal or external command,
operable program or batch file.
PS C:\Users\Aaryan> cd "c:\Users\Aaryan\Desktop\kotlin\" ; if ($?) { kotlinc MainActivity.kt -include-runtime -d MainActivity.jar } ; if ($?) { java -jar MainActivity.jar }
'java' is not recognized as an internal or external command,
operable program or batch file.

我已经安装了java和change环境变量，但它不起作用