Eclipse error cannot be resolved to a type

Question

I have a dynamic web project that I am working on to migrate a jsp servlet app from JRun to Tomcat   I am getting the error   com ibm ivj eab dab DatastoreJDBC cannot be resolved to a type   I have the   class files sitting inside a com ibm ivj eab dab folder  exactly how I found them    I have tried creating a jar file and adding that to the build path via  Add External Jar   I have also tried adding an  External Class Folder  and pointing to the folder that contains the  com  directory in question   Still  the error persists   What is strange is if I start typing the package name eclipse actually auto-completes the class for me    pictured below    Any ideas would be greatly appreciated   Maybe the classes were compiled for a much older java version and that is causing trouble   Maybe there is something I need to do to ensure the classes end up in the WEB-INF lib directory    I

User · Answer

To solve the error     cannot be resolved to a type    do the followings    Right click on the class and select  Build Path-- Exclude  Again right click on the class and select  Build Path-- Include    It works for me

User · Answer

Solution    1 Project -  Build Path -  Configure Build Path  2 Select Java Build path on the left menu  and select  Source   3 Under Project select Include All  and click OK  Cause    The issue might because u might have deleted the CLASS files or dependencies on the project

User · Answer

There are two ways to solve the issue  cannot be resolved to a type      For non maven project  add jars manually in a folder and add it in java build path  This would solve the compilation errors  For maven project  right click on the project and go to maven -  update project  Select all the projects where you are getting compilation errors and also check  Force update of snapshots releases   This will update the project and fix the compilation errors

User · Answer

Right click your project name  Click Properties  Click Java Build Path  Click on Add Class Folder  Then choose your class    Alternatively  Add Jars should work although you claim that you attempted that    Also   have you tried turning it off and back on again    Restart Eclipse

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I just closed all the files and reopened them  and voila    Hope this helps someone in the future

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Easy Solution  Go to      Project property -  java builder path -  maven -  find c3p0-0 9 5 2 jar    and see the location where the file is stored in the local repository and go to this location and delete the repository manually

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For many new users don t forget to add an asterisk     after your import statements if you wanna use all the classes in a package    for example  import java io     public class Learning        public static void main String   args                 BufferedInputStream sd   new BufferedInputStream System in                  no error                                                                             import java io   public class Learning        public static void main String   args                 BufferedInputStream sd   new BufferedInputStream System in                  BufferedInputStream cannot be resolved to a type error

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I was importing the source into the wrong folder   I m so used to using Visual Studio  that I expect all IDE s to be so accommodating

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Also  there is the solution for IvyDE users  Right click on project -  Ivy -  resolve It s necessary to set ivy mirror property in build properties

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Also If you are using mavenised  project  then  try  to update your project by clicking  Alt F5   Or right click on the application and go to maven  update project   It builds all your components and resolves if any import error is there

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Project -  Clean  can at least sometimes be sufficient to resolve the matter

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First you need to update the pom xml by adding below       lt dependency gt       lt groupId gt org springframework lt  groupId gt       lt artifactId gt spring-web lt  artifactId gt       lt version gt 4 1 6 RELEASE lt  version gt       lt  dependency gt    1  Right click your project name   2  Click Properties   3  Click Java Build Path   4  Check on  Maven Dependencies  in Order and Export tabl   In my case  previously it was not enabled  So when I enabled it my  GetMapping annotation works fine

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Right click Project   Properties Java Build Path   Add Class Folder Select the bin folder Click ok Switch Order and Export tab Select the newly added bin path move UP Click Apply button

User · Answer

Project - gt  Build Path - gt  Configure Build Path Select Java Build path on the left menu  and select  Source   click on Excluded and then Include All  and then click OK     Cause   The issue might because u might have deleted the CLASS files   or dependencies on the project   For maven users   Right click on the project  Maven   Update Project

User · Answer

Download servlet-api jar file and paste it in WEB-INF folder it will work

User · Answer

Solved the problem by dropping the jar into WEB INF lib

User · Answer

For maven users    Right click on the project Maven Update Project

User · Answer

copying the jar files will resolve  If by any chance you are copying the code from any tutorials  make sure the class names are spelled in correct case   for example i copied a code from one of the tutorials which had solr in S cap  Eclipse was continiously throwing the error and i also did a bit of googling    everything was ok and it took 30 mins for me to realise the cap small issue  Am sure this will help someone

[java] Eclipse error ... cannot be resolved to a type

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