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I've been trying to install Netbeans on Debian 9. I want to use the JDK that already comes with it. It's OpenJDK 8. But when I tell the installer to look into that folder for the JDK it says it doesn't have it.

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However, if I direct the installer to the JDK I downloaded from Oracle, it seems to work as shown below.

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This folder also doesn't work enter image description here

What's causing this?

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You’ve probably installed openjdk-8-jre, which installs /usr/lib/jvm/java-1.8.0-openjdk-amd64 (on amd64) but only contains the JRE, not the full JDK. To install the JDK, you need to install the openjdk-8-jdk package too.

  • I edited the question because there is another folder that says JDK as well. And that one also doesn't work. I'm talking about the third screenshot. Is that what you meant? – Morgan Apr 7 '18 at 18:54
  • No, both those folders point to the same place (java-1.8.0-openjdk-amd64 is a symlink to java-8-openjdk-amd64). I meant what I wrote, which is that you need to install the openjdk-8-jdk package. – Stephen Kitt Apr 7 '18 at 19:06
  • Alright, the two folders were confusing at first. I installed the package you said and now it works. Thanks! – Morgan Apr 7 '18 at 19:08

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