Netbeans - class does not have a main method

Question

My program is just a simple System out println      But netbeans cannot find the main method  Is netbeans 6 7 1 conflict with WIN7  Any possible error

User · Answer

While this may be an old question  the problem is still occurring these days  and the exact question is still not answered properly   It is important to note that some projects have multiple classes with a main method   In my case  I could run the project via the main class  but I could not run a particular other class that had a main method  The only thing that helped me was refactoring the class and renaming it  I ve tried    restart NetBeans re-open the project clear NetBeans cache delete the file and create a new one with same name and contents delete the file and create a new one with same name but very simple contents with only main method and print out message rename the class  refactor  so a temp name and back delete the project and create a new one with the same sources   The only thing that let me run this class is renaming it permanently  I think this must be some kind of a NetBeans bug   Edit  Another thing that did help was completely uninstall Netbeans  wipe cache and any configuration files  It so happened that a newer Netbeans version was available so I installed it  But the old one would have probably worked too

User · Answer

Sometimes passing parameters in the main method causes this problem eg  public static void main String   args int a   If you declare the variable outside the main method  it might help

User · Answer

It was most likely that you capitalized  m  in  main  to  Main   This happened to me this instant but I fixed it thanks to the various source code examples given by all those that responded  Thank you

User · Answer

Exceute the program by pressing SHIFT F6  instead of clicking the RUN button on the window  This might be silly  bt the error main class not found is not occurring  the project is executing well

User · Answer

Make sure it is   public static void main String   argv    No other signature will do

User · Answer

I had this issue as well  Error  Could not find or load main class test Test   I ll explain this relatively basically since I know I would have appreciated someone doing that when I was looking for my answer    When I right-clicked on the project  left hand side of the screen unless you got rid of the projects tab  and went to properties and then run  the main class had the projectname classname  which is what confused me  For example  I created a project  test  to test this out  and when I went to   right-click  test or Source Packages -  properties -  run -  main class  had Test test in that field  which is what the problem was  the class is test  not Test test  so I clicked browse to its right  and the only thing in the list to select from was test  and when I selected that and tried rerunning it  it finally worked   Additionally  I found that when you create a new project in Netbeans  one of the things it originally gives you  in my case of the project named test  is package test   If you are having this problem  then like me  you probably originally got rid of that line seeing it as just another line of code you didn t need  That line of code is what enabled your main class which in my case was Test test to find the main class  test from that

User · Answer

If you named your class with the keyword in Java  your program wouldn t be recognized that it had the main method

User · Answer

Check for correct method declaration   public static void main String     args    Check netbeans project properties in Run   main Class

User · Answer

My situation was different I believe because non of the above solutions di work for me  Let me share my situation    I am importing an existing project  NewProject- Java- Import Existing Projects  I name the project to xyz  The  main  function exists in Main class  I try to run the code I modified in the main function but the error pops out  I tried the shift f6  specifically rebuild  Nothing works   Solution  I took the project properties and saw the  Source Package Folder  mappings in the Sources branch was blank  I mapped it and voila it worked    Now anyone might think that was very silly of me  Although I am new to Java and Netbeans this is not the first time I am importing sample projects and I saw all of them had the properties similar  The only difference I saw was that the main class was not having the name as the project which I believe is a java convention  I am using JDK7u51  latest till date   is it causing the issue  I have no idea  But I am happy the project is running fine now

User · Answer

This destroyed me for a while     I knew that there HAD to be an easier way with a world class IDE like Netbeans   The easiest method is to press Shift F11  Clean and Build Project   then hit F6 to run it   It refreshes Netbeans appropriately and finds your main without all the manual labor  and if you have multiple mains  it will give you the option to select the correct one

User · Answer

in Project window right click on your project and select properties go to Run and set Main Class    you can brows it    this manual work if you have static main in some class    public class Someclass                    param args the command line arguments             public static void main String   args                  your code           Netbeans doesn t have any conflict with W7 and you can use version 6 8

User · Answer

This happens when you move your main class location manually because Netbeans doesn t refresh one of its property files  Open nbproject project properties and change the value of main class to the correct package location

[netbeans] Netbeans - class does not have a main method

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