老师：

       安装JDK后，设置环境变量，还是安装不成功。麻烦帮我看下，哪出错了。

JAVA_HOME

D:\Program Files\Java\jdk-11

PATH(为啥我的会这么长一串)

%SystemRoot%\system32;%SystemRoot%;%SystemRoot%\System32\Wbem;%SYSTEMROOT%\System32\WindowsPowerShell\v1.0\;C:\Program Files (x86)\Agilent\IO Libraries Suite\bin;C:\Program Files\Agilent\IO Libraries Suite\bin;C:\Program Files (x86)\IVI Foundation\VISA\WinNT\agvisa;C:\Program Files\IVI Foundation\VISA\Win64\agvisa;C:\Program Files (x86)\IVI Foundation\IVI\bin;C:\Program Files\IVI Foundation\IVI\bin;C:\Program Files\IVI Foundation\VISA\Win64\Bin\;C:\Program Files (x86)\IVI Foundation\VISA\WinNT\Bin;%JAVA_HOME%\bin

CALSSPATH

.;%JAVA_HOME%\lib\dt.jar;%JAVA_HOME%\lib\tools.jar