The declared package does not match the expected package

Question

I am using Eclipse and have not used Java for sometime  However  I can compile my code on the command-line just fine and generate the necessary  class files  In Eclipse  it complains that The declared package  Devices  does not match the expected package     What does this mean and how can I fix it    Sample code   package Devices   public final class DevFrequency        public short messageID      public double frequency      public short converterID      public DevFrequency                    public DevFrequency short  messageID double  frequency short  converterID                messageID    messageID          frequency    frequency          converterID    converterID            The name of my project is DeviceDDS

User · Answer

Make sure that Devices is defined as a source folder in the project properties

User · Answer

I fixed this by removing an  excluding  attribute for that package in my  classpath file  Remove the attribute  not the whole tag  or  src java  will cease to be a source folder    lt classpathentry excluding  com myproject mypackage mysubpackage   kind  src  path  src java   gt

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I faced this issue too when I had imported an existing project to eclipse  It was a gradle project  but while importing I imported it as regular project by clicking General-  Existing Projects into Workspace  To resolve the issue I ve added Gradle nature to the project by         Right click on Project folder -  Configure-  Add Gradle Nature

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I had this problem - the other classes within my package were fine  but one class had the error against it  There was nothing wrong with the package declaration   I fixed it by doing refactor- gt move and moved the class to another package temporarily  then refactor- gt move back to the original package

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I fix it just changing the name to lowercase and now Eclipse recognizes the package

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This problem got resolved by mentioning the package name   I moved my file Test Steps java which was under package stepDefinition    by just adding the package stepDefinition the problem got resolved  So this problem can occur when you have a package and you are not using in your class file   Adding it has resolved the problem and the error was no longer appearing

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Eclipse expects the declared package to match the directory hierarchy - so it s expecting your Java file to be in a directory called  Devices  under your source root  At the moment it looks like the file is directly in your source root  So create the appropriate directory  and move the file in there   Note that conventionally  packages are in lower case and include your organization name in reverse DNS order  e g   com foo devices

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This happened to me when I was checking out a project from an svn repository in eclipse  There were jar files in my  m2 folder that eclipse wasn t looking at  To fix the issue I did   right click project folder Configure   Convert to Maven Project  and that solved the issue

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I resolved the problem by following these steps    Select the project - Right click - java build path  In source tab - you change the src to src main java  Eclipse will reorder all the project

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Got the same kind of error but my package was absolutely correct  When I just closed and opened my editor  the error disappears  Hope this might help in some scenarios

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Solution 1   One solution that worked for me when this error   The declared package does not match the expected package   occured for a project I checked-out from eclipse CVS    1 Right click the project in the navigation bar and click  delete  2 Make sure  Delete project contents on disk  option is NOT checked  and click OK  3 Now after the project is deleted  go to File -  Import -  General -  Existing Projects into Workspace 4 Select your workspace from the directory listing and check the box next to your project name  Click  Finish      Solution 2   Once again I got this error with the following message   Eclipse build errors - java lang Object cannot be resolved I had to follow another route mention here and the error went away   In the mean time  the work around is to remove the JRE System Library from the project and then add it back again   Here are the steps    Go to properties of project with the build error  right click   Properties  View the  Libraries  tab in the  Build Path  section Find the  JRE System Library  in the list  if this is missing then this error message is not an eclipse bug but a mis-configured project   Remove the  JRE System Library  Hit  Add Library       Select  JRE System Library  and add the appropriate JRE for the project  eg   Workspace default JRE   Hit  Finish  in the library selection and  OK  in the project properties and then wait for the re-build of the project   Hopefully the error will be resolved

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I had have this sort situations when I copied classes from other packages projects    Menu- Project- Clean usually helps

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There are a million answers  but here s another one  copy the files into a new package  delete the old package and rename the new package to the old package s name

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You need to have the class inside a folder Devices

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I was using Spring Tool Suite 4  Not able to figure out the issue  The directory structure was according to the package name       But cleaning the project helped me

User · Answer

Try closing and re-opening the file   It is possible to get this error in eclipse when there is absolutely nothing wrong with the file location or package declaration   Try that before spending a lot of time trying these other solutions   Sometimes eclipse just gets confused   It s worked for me on a number of occasions   I credit the idea to Joshua Goldberg

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I had the same issue with a maven project in Eclipse IDE  I was able to resolve it by replacing the  classpath file with the correct format  After replacing close and open the project  Sample  classpath file  lt  xml version  quot 1 0 quot  encoding  quot UTF-8 quot   gt   lt classpath gt       lt classpathentry kind  quot src quot  output  quot target classes quot  path  quot src main java quot  gt           lt attributes gt               lt attribute name  quot optional quot  value  quot true quot   gt               lt attribute name  quot maven pomderived quot  value  quot true quot   gt           lt  attributes gt       lt  classpathentry gt       lt classpathentry excluding  quot    quot  kind  quot src quot  output  quot target classes quot  path  quot src main resources quot  gt           lt attributes gt               lt attribute name  quot maven pomderived quot  value  quot true quot   gt           lt  attributes gt       lt  classpathentry gt       lt classpathentry excluding  quot    quot  kind  quot src quot  output  quot target classes quot  path  quot src main webapp quot  gt           lt attributes gt               lt attribute name  quot maven pomderived quot  value  quot true quot   gt           lt  attributes gt       lt  classpathentry gt       lt classpathentry kind  quot src quot  output  quot target test-classes quot  path  quot src test java quot  gt           lt attributes gt               lt attribute name  quot optional quot  value  quot true quot   gt               lt attribute name  quot maven pomderived quot  value  quot true quot   gt               lt attribute name  quot test quot  value  quot true quot   gt           lt  attributes gt       lt  classpathentry gt       lt classpathentry kind  quot con quot  path  quot org eclipse jdt launching JRE CONTAINER org eclipse jdt internal debug ui launcher StandardVMType JavaSE-1 8 quot  gt           lt attributes gt               lt attribute name  quot maven pomderived quot  value  quot true quot   gt           lt  attributes gt       lt  classpathentry gt       lt classpathentry kind  quot con quot  path  quot org eclipse m2e MAVEN2 CLASSPATH CONTAINER quot  gt           lt attributes gt               lt attribute name  quot maven pomderived quot  value  quot true quot   gt           lt  attributes gt       lt  classpathentry gt       lt classpathentry kind  quot output quot  path  quot target classes quot   gt   lt  classpath gt

User · Answer

Make sure you are not using default package  Create a new package with name  devices  and copy this code inside it and use

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Create directory  your project name  in workspace root directory of your project  Copy   java from  src  to that directory  Close and reopen project

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Make sure that You have created a correct package You might get a chance to create folder instead of package

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Create a new package under your project called  Devices  and place your class in it  This is equivalent to the class being placed in a directory called  Devices  in your project source folder

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In my case I selected the error marker in the Problems tab and deleted it since the Java s file main method was being executed correctly  That is some glitch in Eclipse Neon with the multitude of plugins it has installed

[java] The declared package does not match the expected package ""

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