Editor does not contain a main type in Eclipse

Question

I downloaded eclipse-jee-kepler-SR1-linux-gtk-x86 64 tar gz  This eclipse is built-in with java and my Lubuntu is 64-bit  Whenever I compile and run a simple code in java like this one below   public class Sample      public static void main String   args          System out println  YOLO             I always get an Editor does not contain a main type  I put the file in a project folder called Sample  This eclipse should compile java code because its an IDE distribution specialized for java   How can i resolve this error   Any help would be much appreciated   Here s my project structure

User · Answer

For me  classpath entry in  classpath file isn t pointing to the right location  After modifying it to  lt classpathentry kind  con  path  org eclipse jdt launching JRE CONTAINER org eclipse jdt internal debug ui launcher StandardVMType JavaSE-1 8   gt  fixed the issue

User · Answer

I installed Eclipse and created a Java project  Created new Java file outside the  src  directory and tried to run that  I got the same error  Editor does not contain a main type   I just moved the java file into the  src  folder and could simply run the program  I couldn t understand what other answers were asking to try  It was so simple

User · Answer

I suspect the problem is that Sample java should be in a package inside the src folder   I guess that eclipse will not automatically look outside of there

User · Answer

First look for  the main method is there or not If it is there  do restart your eclipse and right click on the page which having main method  Go to run as Java application

User · Answer

Problem is that your folder is not identified as a Source folder    Right click on the project folder -  Properties Choose  Java Build Path  Click on  Sources  tab on top Click on  Add Folder  on the right panel Select your folders and apply

User · Answer

Just change  String   args  to  String args

User · Answer

Right click on your project  select New -  Source Folder  Enter src as Folder name  then click finish    Eclipse will then recognize the src folder as containing Java code  and you should be able to set up a run configuration

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Ideally  the source code file should go within the src default package even if you haven t provided any package name  For some reason  the source file might be outside src folder  Create within the scr folder it will work

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Create a source folder under Java Resources

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place your main method class in src folder in Eclipse Environment

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I had the same issue  I had accidentally deleted the  classpath and  project file in my workspace  Luckily it was in Recycle bin  as soon as it was restored  there were no issues

User · Answer

Make sure you do Run As   Java Application   If not you could try a Project   Clean  Some more questions that deals with this that could be helpful   Refer this

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Right click your project   Run As   Run Configuration      Java Application  in left side panel  - double click on it  That will create new configuration  click on search button under Main Class section and select your main class from it

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I just had this exact same problem  This will sound crazy but if someone sees this try this before drastic measures  delete method signature   public static void main String args       Not the body of your main just method declaration   Save your project then re-write the method s header back onto its respective body  Save again and re-run  That worked for me but if it doesn t work try again but clean project right before re-running   I don t know how this fixed it but it did  Worth a shot before recreating your whole project right

User · Answer

Right click on Sample java file and delete it  Now go to File -  New -  Class     enter name of program  i e  hello    click on finish   It will create file hello java  Enter source code of program and finallly press ctrl   F11

[java] Editor does not contain a main type in Eclipse

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