Cannot Be Resolved To A Type Java Error
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here for a quick overview of the site Help Center Detailed answers to any questions you might world cannot be resolved to a type have Meta Discuss the workings and policies of this site About java error cannot be resolved to a variable Us Learn more about Stack Overflow the company Business Learn more about hiring developers or posting ads arraylist cannot be resolved to a type java with us Stack Overflow Questions Jobs Documentation Tags Users Badges Ask Question x Dismiss Join the Stack Overflow Community Stack Overflow is a community of 4.7 million programmers, cannot be resolved to a type java eclipse 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 {
String Cannot Be Resolved To A Type Java Eclipse
... } 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 4,09153757 asked Apr 7 '11 at 10:22 Mellon 9,73746139226 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 ---> clean See http://philip.yurchuk.com/2008/12/03/eclipse-cannot-be-resolved-to-a-type-error/ sh
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
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done was add a Spring @Autowired annotation. I saved the file and voila, everything eclipse cannot be resolved to a type maven goes to crap. I then spend a stupid amount of time trying to track down the cause. I took the changes eclipse cannot be resolved to a type same package out. I did a clean and rebuild and retest (everything passed; this was Eclipse-only). I added new classes to see if they broke (they did). I did a false modify (add space, remove space, http://stackoverflow.com/questions/5579558/why-i-got-cannot-be-resolved-to-a-type-error save) to see if that broke said file (it did). It was a death spiral. No matter 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 http://philip.yurchuk.com/software/eclipse-cannot-be-resolved-to-a-type-error/ 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 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
New Topic programming forums Java Java JSRs Mobile Certification Databases Caching Books Engineering Languages Frameworks Products This Site Careers Other all forums Forum: IDEs, Version Control and other tools https://coderanch.com/t/585246/vc/Frustrating-eclipse-resolved-type Frustrating eclipse - cannot be resolved to a type ? Arnold Strong Ranch Hand Posts: 40 posted 4 years ago I don't really know what I am doing. I am just picking up random tutorials from the net and doing a Java project. I made a "lib" folder in my eclipse project. Added the necessary JARs to build path. When I try to cannot be make a simple "hello world" type of example, I get the same error "cannot be resolved to a type" at many places. Looks like i have to import the JAR files by putting import statements, right ? If yes, then how do i import the JAR files ? Please help me. Aniruddh Joshi Ranch Hand Posts: 275 I like... posted 4 years ago Option cannot be resolved 1 - Right click on project in Navigator or Project Explorer > Properties > Java Build Path > Libraries > Add jars > Add all jars in your lib folder Option 2 - Right click on project in Navigator or Project Explorer > Properties > Java Build Path > Libraries > Add external jars > Add jars from your hard disk Anrd "One of the best things you could do is to simplify a larger application into a smaller one by reducing its process and complexity - Fowler" William P O'Sullivan Ranch Hand Posts: 859 I like... posted 4 years ago What type of "project" did you start. When you select "new project", Eclipse does most of the setup for you. You then need to add dependent jars to your Java Build Path in the project properties. Eclipse adjusts the .classpath file automatically. I sense you are trying to do too much too quickly, even your comment about "random" examples. Start small, there are in fact a ton of examples in the posts here. I simply copy them to a workspace and help! WP Aniruddh Joshi Ranch Hand Posts: 275 I