The project cannot be built until the build path errors are resolved

Question

While compiling an android project in eclipse 3 4 2  I am getting The project cannot be built until the build path errors are resolved    I got a temporary solution  from the blog http   www scottdstrader com blog ether archives 000921 html  The resolution was to force a resave of the selected projects  and their  classpath files     Open the project properties Select Java Build Path   Libraries Add a new  arbitrary library  to be deleted later    OK Wait for the workspace to refresh  or force a refresh of the project  The error s  will go away Remove the dummy library   The only other references I could find were to make minor alterations of contents of the  classpath file    Is there any permanent fix for this issue

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I was getting an additional warning  The compiler compliance specified is 1 6 but a JRE 1 8 is used   Resolving this warning make the error also go away   The steps are as follows   I right-clicked on it  then clicked on Quick Fix   From the dialog that opened I selected Open the Compiler Compliance property page  and clicked the Finish button    This is same as Java Compiler section    In this dialog I found the Compiler compliance level drop down and changed 1 6 to 1 8  and clicked on Apply and close   I got a message box Compiler Settings Changed which asked if I wanted to Build the project now    I clicked on Yes   The build path error went away

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just check if any unnecessary Jars are added in your library or not  if yes  then simply remove that jars from your library and clean your project once  Its worked for me

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This happens when libraries added to the project doesn t have the correct path    Right click on your project  from package explorer  Got build path -  configure build path Select the libraries tab Fix the path error  give the correct path  by editing jars or classes at fault

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Added below to pom xml file and it worked eventually     lt dependency gt       lt groupId gt javax servlet lt  groupId gt       lt artifactId gt javax servlet-api lt  artifactId gt       lt version gt 4 0 0 lt  version gt       lt scope gt provided lt  scope gt   lt  dependency gt

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This is what worked for me    Go to    m2 repository and deleted everything there by running rm -rf  Make sure everything is deleted   Re-launch eclipse or STS Right click on project -  Maven -  update project

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Go to  gt  Right CLick on your project folder  gt  Build Path  gt  Configure Build Path  gt  Libraries Tab  gt  remove project and external dependencies  gt  apply  amp  close Now  Gradle refresh your project

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1-Right CLick on your project folder  Choose Build Path  gt  Configure Build Path 2-Select Libraries Tab and delete any arbitrary library present there  3-Click on Add Library option  Select JRE System Library and click Next  4-Choose last Radiobutton option Workspace default JRE and click Finish  5-press f5 for refresh  6-run ur program

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I ve seen this problem a few times  got it again right now on my home computer with Eclipse 4 2     Forcing a resave  by changing the classpath e g  by adding a library  save  change-back  works temporarily  But the problem comes back when Eclipse is restarted     Nuking the Eclipse workspace from orbit will permanently fix it  until next time   But there must be a better way

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If you think you ve done everything correctly but Eclipse still complains about the jars  refresh the folder where the jars are and make sure eclipse knows they ve been added to the project  Specifying the file path alone is  apparently  not enough

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This what fixed it for me     I was having an issue with my spring-core jar  I deleted the entire release directory located here   I m on win 10    C  Users         m2 repository org springframework spring-core 4 3 1 RELEASE  I right clicked on the project   Maven   Update project and my exclamation mark disappeared  No problems any more   Here is the source where I found the information   http   crunchify com cannot-be-read-or-is-not-a-valid-zip-file-how-to-fix-maven-build-path-error-with-corrupted-jar-file

User · Answer

Have you tried using Project   Clean    from the menu  This will force a new build on the selected projects in Eclipse

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None of the other answers worked for me  Even after fixing my build path issues  doing a refresh  clean  rebuild  and restart  of both eclipse and the computer   I was still getting the little red exclamation point   I fixed it by closing the project  right-click  close project  and reopening it  double-click the closed project   which seemed to force eclipse to  notice  that the build path problems had been corrected

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For my mac osx Eclipse  I followed following steps    Right CLick on your project  Choose Build Path   Configure Build Path Select Libraries Tab and delete any arbitrary library or anything else causing errors in Build Path  Click on Add Library button  Select JRE System Library and click Next  Choose last Radiobutton option Workspace default JRE and click Finish  Clean and build your project

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Goto to Project  Build Automatically   Make sure it is ticked

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In Eclipse this worked for me  right click project  -  Properties -  Library Section  Add  any library at all  -  select library and click remove -  press okay

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I ve faced this issue a couple of times and following the below steps has resolved both the times  1  Navigate to C  Users   2  locate the   m2  folder and delete it    Now navigate to the particular project in eclipse and Right-click on the project   Maven   Update Project   wait until the project is updated and in my case following the above steps resolved both the times

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get a cmd and run      mvn eclipse eclipse

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This works for me  close the project then re-open it  this will force eclipse to see it as a fresh project and detects a correct build path

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I ran into this annoying issue with the Play framework  It would be nice if there was some way of knowing what build errors Eclipse is unhappy about  but it s not going to tell you  With one project  I was able to close the project  rebuild the Eclipse configuration with sbt eclipse  and reopen  With an almost identical project  that didn t work  But deleting the project  rebuilding the Eclipse configuration with sbt eclipse  and importing  did the trick

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On my Mac this is what worked for me   Project   Clean  errors and warnings will remain or increase after this  Close Eclipse Reopen Eclipse  errors show momentarily and then disappear  warnings remain    You are good to go and can now run your project

[eclipse] The project cannot be built until the build path errors are resolved.

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