What To Do When Your Editor Does Not Contain A Main Type?

The problem

It’s a common problem for developers to encounter the “editor does not contain a main type” error message when working with their code editor or Integrated Development Environment (IDE). This error message can be frustrating and may prevent you from running your code, testing it, or deploying it. The error message can occur when you’re working with Java, C#, or other programming languages that require a main method or function to be defined. This is the entry point for your application or program and is essential for it to run. Without it, your program cannot be executed.

The solution

If you’ve encountered this error message, there are a few things you can do to resolve it. Here are some steps you can take:

1. Check your code

The first thing you should do is double-check your code to make sure that you have defined a main method or function. This is the most common cause of the error message, and it’s possible that you may have missed something. Make sure that your main method or function is properly defined with the correct syntax and that it’s in the right place within your code. Check for typos or mistakes that may be preventing your code from running.

2. Check your file structure

Another possible cause of the error message is an issue with your file structure. Make sure that your code is saved in the correct file with the correct filename and file extension. Check that your file is located in the correct directory and that your IDE or code editor is pointing to the correct location.

3. Check your IDE or code editor settings

Sometimes, the error message may be caused by an issue with your IDE or code editor settings. Check that your IDE or code editor is configured correctly and that it’s set up to work with the programming language you’re using. You may also need to check your IDE or code editor preferences or options to make sure that the correct settings are enabled or disabled. For example, some settings may prevent your code from running if they’re not configured correctly.

4. Restart your IDE or code editor

If you’ve tried the above steps and you’re still encountering the “editor does not contain a main type” error message, try restarting your IDE or code editor. Sometimes, this can resolve issues that are preventing your code from running.

5. Seek help

If you’re still unable to resolve the error message, don’t hesitate to seek help. You can reach out to online communities or forums where other developers may be able to offer advice or solutions. You can also consult your IDE or code editor documentation or contact their support team for assistance.


Encountering the “editor does not contain a main type” error message can be frustrating, but it’s not an insurmountable problem. By following the above steps, you can identify and resolve the issue that’s preventing your code from running. Remember to double-check your code, file structure, and IDE or code editor settings, and don’t hesitate to seek help if needed.