Java Error Cannot Be Resolved To A Type
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Eclipse Cannot Be Resolved To A Type Same Package
programmers, just like you, helping each other. Join them; it only takes a minute: Sign up Why I got “ cannot be resolved to a type” error? up vote 8 down vote favorite I am developing a dynamic web project (RESTful jersey) under Eclipse IDE. Under src/my/demo/service folder I have CarService.java class public class CarService
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{ ... } Under src/my/demo/controller folder I have UserController.java class import my.demo.service.CarService; public class UserController{ private CarService carService; //ERROR: CarServcie cannot be resolved to a type } I do have imported the CarService, why eclipse give me the error "CarServcie cannot be resolved to a type" in my UserController.java? --------Edit------------------ I found the cause: for some reason, my.demo.service has the same level as src/ in eclise project explorer view. After I move my.demo.service under src/, it is fine. Seems I should not create new package in "Project Explorer" view in Eclipse... But thank you for your response:) java eclipse share|improve this question edited Apr 7 '11 at 15:07 Reddy 4,11953757 asked Apr 7 '11 at 10:22 Mellon 9,84246141226 Does the CarService class belong to the package my.demo.service, and not just the folder? –Andreas Johansson Apr 7 '11 at 10:25 add a comment| 5 Answers 5 active oldest votes up vote 22 down vote u just need go to Project ---> cle
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Overflow Questions Jobs Documentation Tags Users Badges Ask Question x Dismiss Join the Stack Overflow Community Stack Overflow is a community of gson cannot be resolved to a type eclipse 4.7 million programmers, just like you, helping each other. Join them; it only takes a minute: Sign up “Cannot be resolved to a type” Error while compiling a Java project in Eclipse Indigo up vote 1 http://stackoverflow.com/questions/5579558/why-i-got-cannot-be-resolved-to-a-type-error down vote favorite One day I opened eclipse and randomly got this "(x) Cannot be resolved to a type" (x could be, for example "String"). This happens on all my existing projects, and all projects I create. I cleaned all projects, restarted eclipse, and restarted my computer, all to no avail. What could be the cause and how can i fix it? Please provide an explanation as to what the cause is. http://stackoverflow.com/questions/33459516/cannot-be-resolved-to-a-type-error-while-compiling-a-java-project-in-eclipse-i Thank you. java eclipse share|improve this question asked Nov 1 '15 at 5:30 Ajeet Kljh 205 Restart eclipse with eclipse -clean. –Elliott Frisch Nov 1 '15 at 5:32 1 If this is a large project, then check the lower right-hand corner. If it's still saying that it's building the workspace or something, you'll need to wait for it to finish. In my experience, Eclipse often marks symbols as "cannot be resolved" or the like even before it's finished gathering all the information it needs from other places; as it puts all the information together, the errors eventually go away. –ajb Nov 1 '15 at 5:47 Did you randomly upgrade your installed Java version, making references to the old one (on the Installed JREs preference page and in your projects) invalid? –nitind Nov 1 '15 at 8:20 sometimes close and open project in eclipse will fix this issue –Saravana Nov 1 '15 at 8:49 add a comment| 1 Answer 1 active oldest votes up vote 0 down vote This can happen when you change Java version from the build path. You could try this. Check Java version, change it if it's not what it's supposed to be. restart eclipse. All errors should automatically go. share|improve this answer answered Ju
resolve classes. Classes that are in the same package as the class I'm editing. Classes that are fully qualified in the import statement. Not good. The last thing I had done was add a Spring @Autowired annotation. I saved http://philip.yurchuk.com/software/eclipse-cannot-be-resolved-to-a-type-error/ the file and voila, everything goes to crap. I then spend a stupid amount of time trying to track down the cause. I took the changes out. I did a clean and rebuild and retest (everything passed; this was http://blog.sherifmansour.com/?p=207 Eclipse-only). I added new classes to see if they broke (they did). I did a false modify (add space, remove space, save) to see if that broke said file (it did). It was a death spiral. No matter cannot be how I changed the code, the same problem was there. Turns out, it wasn't the annotation, or anything else in Spring, or any of my code, or any of my Eclipse plugins. It was a step before that killed me. I was doing a little cleanup and I created a temp directory at the top of my project folder so I could move some files there. It wasn't nested in anything, other than the top level directory. What cannot be resolved could go wrong? Apparently, that makes Eclipse see red. Squiggly red. The solution was simply to do a refresh (F5) on my project. Just as quickly as it started, the problem went away. That smells like a bug to me, but if it was I figure I'd see a lot more mentions in Google or the Eclipse bug tracker. I'm really hoping this helps someone save some time. Update: If that doesn't work, try: Clean, refresh, build, restart Also, remember any external build/clean scripts you might be using. For instance, Grails has a command line "clean" you may have to invoke. Same if you have Ant or Maven builds. David Resnick (comment below) discovered this tip for those with an external build script: Windows–>Preferences–>Java–>Compiler–>Building–>Output folder–>”Rebuild class files modified by others”. This exists in Eclipse 3.5; I’m not sure about earlier versions. Another issue I've found over the years is problems when upgrading Eclipse. In theory, new versions of Eclipse should update your workspace and project files just fine. In practice, they can become corrupted. My new rule is to create a new workspace for every major version upgrade of Eclipse (maybe more often if you're cautious). Then I copy those projects and import the copy. This ensures I have a backup plan should something go awry. You may need to reimport your project(s) if there's a problem that won't go away after
they were there). I was always getting the message: import ClassName cannot be resolved. Where ClassName was my imported class. I'm using the MyEclipse Workbench 5.5.1 on Eclipse 3.2. Here are a few tips on how you can fix this (some worked for me, some didn't): ‘Clean' Your Eclipse Project: Go to Project > Clean in Eclipse [This seems to work for me] Refresh your project folder (right click on your project > refresh) Re-build your project Clean your builds (If using Ant or Maven - clean your builds) Recreate your project in Eclipse ‘Switch' Workspace - then Switch back (Eg Change to Debug, then switch back to Java) ‘Switch' Workspace - then Switch back (Eg Change to Debug, then switch back to Java) Remove and re-add your JRE: 1. Right Click on your project > properties 2. Click on the Libraries tab 3. Click on the JRE 4. Click remove, then OK 5. Repeat 1-3 again, but add the JRE again Hope at least ONE of those tips help! Published: May 4, 2008 Filed Under: Development Tips & Tricks, Java / J2EE, Web Development Tags: eclipse : java : Java / J2EE : Web Development 87 Responses to "Eclipse "Import cannot be resolved" error" « Older Comments priyanka sadhwani says: November 1, 2011 at 8:03 pm Thanks cleaning worked..:) Kalle says: November 2, 2011 at 8:50 pm Thanks a lot, "clean" worked great, good to see someone publish proper hands on tips ! Thank You sourabh says: December 2, 2011 at 1:31 pm Hi All, I tried everything mentioned above; everything from clean to refresh to switch. I am getting the error : Exception in thread "main" java.lang.Error: Unresolved compilation problems: The import com.sun.net.ssl.internal.ssl.Debug cannot be resolved Debug cannot be resolved Debug cannot be resolved Debug cannot be resolved ----------------------------- I think the trouble is with jre version , at this error I had jre1.7, and when I used 1.5 this error was gone but a new error for Javax.swing was introduced. Almost wasted two days on it. If anybody can help, it would be appreciated. Yahya says: December 6, 2011 at 3:49 am Thank you!!! … It really helped me too…I am using RAD. I cleaned the project many times but it did not solve the issue. I disabled the option - Build Atomatically' and then cleaned the project and did a manual build. The problem solved. Kan says: December 20, 2011 at 9:03 am Thanks so much! Really saved my time!!! ThePinguin says: December 22, 2011 at 7:41 pm Worked like a charm, thanks! Santosh says: January 22, 2012 at 12:21 am First option/choice worked in my case…. Thanks a lot.. Santosh says: January 22, 2012 at 12:21 am