What is the difference between Java methods with and without parameters?

The difference between parameterized and non-parameterized methods in Java lies in whether they accept parameters or not.

A parameterless method refers to a method that does not accept any arguments, often used to perform specific actions or return certain values without relying on external input.

Methods with parameters refer to methods that accept one or more parameters, receiving external input values as the method’s arguments, and perform corresponding operations or return values based on those parameters. Methods with parameters are typically used in situations where external input is needed, and by passing parameters, it allows the method to be more flexible and versatile.

In conclusion, non-parameterized methods do not accept any arguments, while parameterized methods accept arguments and perform corresponding operations or return values based on those arguments. Choosing the appropriate method type based on specific requirements and scenarios can improve the flexibility and scalability of the code.