"The "diamond problem" in Java commonly referred to by "the "diamond inheritance problem" or "deadly diamond of death," is a problem that can arise in multiple inheritance situations. Java unlike other programming languages such as C++, doesn't allow multi-generation inheritance for classes. Multiple inheritance is an instance where classes can take attributes and methods that were previously shared by multiple superclasses. Java Classes in Pune

The diamond problem arises when the class extends two classes with the same ancestor. This creates confusion for the compiler in determining the method of which superclass to call if both superclasses use methods with the same name as well as signature. Take the following example as an example:

To prevent this problem, Java implements a form of multiple inheritances using interfaces, in which a class can implement multiple interfaces, but just extend a single class. Interfaces allow Java to benefit from the advantages of multiple inheritance without having to face the diamond problem since interfaces don't have implementations of methods, but only signatures of methods.