Web Reference: Jan 21, 2026 · Depending on whether a method returns a value or not, Java methods are mainly divided into void methods and non-void methods. Knowing the difference between these two helps beginners understand when a method is used just to act and when it is used to return a result. Jan 14, 2013 · The compiler complains that void cannot be converted to Void. I don't know how to specify the type of the function interface in the signature of myForEach such that the code compiles. Class methods (also called static methods) belong to the class itself rather than any specific object. Think of them as services the class provides to everyone. You don't need to create a Math object to use Math.sqrt () - the Math class itself provides that functionality.
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