Java Editor not opening my java code

Question

When I double-click one of the .java files from the Project Explorer, it does not open in the Java Editor. I even tried to open it with Open With -> Java Editor to no avail. I even made sure in Windows -> Preferences -> General -> Editors and made the extension .java default to the Java Editor.

I just got this app virtually finished and I feel like I didn't change anything and now I cannot get a .java file to open. If you look at the screenshot, you can see at the red box that the files seem to be open and at a certain line number and such. Any suggestions how to get these files open and viewable?

Answer 1

In Eclipse goto
Window->Open perspective->Jave
Window->Reset perspective

Answer 2

In IntelliJ, go to

Settings -> File types -> Files opened in associated applications

Settings -> File types -> Java source files

in any of them, if a exception is shown in the lower panel with the name of the file you can't open, just remove it and apply changes