Web Reference: Jul 23, 2025 · Interfaces are similar to classes in that they define a set of methods that can be implemented by classes. Here's how to implement multiple inheritance using interfaces in Java. Interfaces are not classes, however, and a class can implement more than one interface. The parent interfaces are declared in a comma-separated list, after the implements keyword. The Java programming language supports multiple inheritance of type, which is the ability of a class to implement more than one interface. An object can have multiple types: the type of its own class and the types of all the interfaces that the class implements.
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