Incompatible Java versions. Eclipse running under 0 [duplicate]

0
votes

I wanted to create a JFrame (got all the Swing libraries needed) but this is what shows up on the design tab. I've been looking for similar problems but it only shows some other specific numbers , for example "Eclipse is running under 1.6" or "1.7" etc. But never have I seen "Eclipse running under 0" , what does this even mean? I uninstalled java and eclipse and re-installed them all over again...same problem. The execution works fine but I want to be able to edit the look of the frame on the design tab too.

enter image description here

2
javaeclipseswingjframe
Is that a giant hyperlink? - achAmháin
My mistake, I just edited it. - Albos Hajdari
Include the screenshot, not a link to it. - achAmháin
I don't think they're allowing screenshots to be presented directly. You either click on the link or edit it since I don't know how, then I'll approve your edition. - Albos Hajdari
Did you really just downvote my question because of this? If yes...Do you (or if not, whoever downvoted it) realize that there are only 2 people on the entire internet that made this question, the first one never got an answer from an old rusty forum, I'm the second one and I'm getting a downvote because someone is just lazy to click on a link...wow. Some people in this community really do suck. - Albos Hajdari

2 Answers

0
votes

Try navigating to Window->Preferences->Java->Compilerand check your compliance level. Make sure it is set to 10.

0
votes

I just uninstalled JDK 10 and got the JDK 8u171 instead. And it's working just like it should have. You're just gonna have to change all of your project's JRE System Library to [jre1.8.0_171] and the compiler too and you're good to go. So far I only tried version 8 and it works, haven't tried other versions but my own thought is that the problem is with version 10, which means maybe version 9 works too but I didn't want to give it a go. (is there even a version 9 of JDK? I don't see any...)