Why Does My Java Program Show a 'Main Method Not Found' Error?

"Error: Main Method Not Found in Class MyClass, Please Define the Main Method As..."

When attempting to run a Java program using the command line with "java," you may encounter an error message indicating that the main method is missing in the specified class. This error can occur due to several reasons.

Causes and Solutions:

The java command looks for an entry point method called "main" within the specified class. To satisfy this requirement, the main method must adhere to specific criteria:

1. Presence in the Nominated Class: The main method must be declared within the class that you wish to execute.
2. Correct Name: The method must be named "main" with exact capitalization.
3. Public Accessibility: The main method must be declared as public.
4. Static Declaration: The main method must be declared as static.
5. Void Return Type: The main method must return a value of type void.
6. String[] Argument: The main method must have exactly one argument of type String[].

Additional Information:

• The String[] argument can be declared using varargs syntax (e.g., String... args).
• The argument serves to pass command-line arguments to the application, even if the application does not explicitly take any arguments.
• Older versions of Java may display a different error message ("java.lang.NoSuchMethodError: main").
• If the error occurs, verify that a main method is present and meets all the specified requirements.

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