How To Fix “Error: Could Not Find Or Load Main Class”?


About The Error

Several Java developers might have encountered the “Error: Could not find or load main class” error, which today, has become a common issue. As you know, Java is an object-oriented programming language, which follows a syntax and is case sensitive, too. Therefore, when your write programs in Java either using command line or a Java virtual machine (JVM), a single mistake in the program’s syntax and/or defining upper-case and lower-case letters incorrectly can land you into such an error.


If you are being frustrated with unwanted errors that are popping up on your computer screen, while compiling and executing your Java programs, then you can find the appropriate solutions here that will help you fix these errors effectively.

Could Not Find Or Load Main Class Error In Java

Why Does It Occur?

This error that occurs in Java usually makes your program fail to execute. Thus, there could be several reasons which are responsible for throwing this error on your computer screen, instead of displaying the relevant output.


Error: Could not find or load main class <class name>


Here are the possible reasons that may cause the “Error: Could not find or load main class” error to occur when executing your program, whether using a command line tool or via an integrated development environment.

  • The class name argument is incorrect

  • The CLASSPATH is not specified correctly

  • Wrong directory in the CLASSPATH

  • The sub-directory does not match the Fully Qualified Name (FQN)

  • There are dependencies missing from the CLASSPATH

  • The class has been declared in the wrong package

  • The JAR file containing the “main” class is moved to another location

After discovering various reasons that cause the error in Java, it is also possible to fix this type of run-time error and allow your program to execute without further problems.

How To Fix “Error: Could Not Find Or Load Main Class”?

You can fix “Error: Could not find or load main class <class name>” in Java by following a couple of effective steps. The steps that are given here are not complicated, rather, these steps will help you diagnose and resolve the error without causing any problems.


Since, Java is a case-sensitive programming language, it is advised that you declare class names with appropriate upper case and lower case letters.


Make sure that you have correctly specified CLASSPATH and its directory in the environment variables (for Microsoft Windows operating system).


The CLASSPATH requires other classes to be included that are necessary for applications which depend on it.


If you carefully check the various causes given above due to which the “Error: Could not find or load main class” issue occurs in your Java program, then you can easily make the necessary corrections in your code and thus, be able to run your programs and/or applications smoothly.

More Solutions At Codexoxo – Contact

The solutions given above will help you resolve the “Error: Could not find or load main class” error in Java easily and quickly. Apart from the solutions given above, if you are still experiencing problems, or are getting other errors and issues with regards to Java programming, you can contact us to avail assistance from our Java experts at Codexoxo. Our support centre can be reached by dialling the toll-free phone number <enter-phone-number> round the clock.


Speak with our team of Java professionals today and get help immediately to resolve any issues and errors which you encounter in Java. Our experts can assist and guide you with tasks such as Java programming, developing websites and applications for desktop as well as mobile platform and much more.


Dinesh Taylor

I am Dinesh, a content writer at Writeup . I wrote many articles at this website. Read my post regularly and share with your friends.

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