What are functional interfaces in Java?
Java's functional interfaces are crucial to embracing functional programming paradigms. A functional interface contains just one abstract method. These interfaces are blueprints for lambda-expressions and method references. They allow developers to write code that is more concise and expressive. These interfaces essentially allow the use of functional concepts such as first-class and higher-order functions within Java. https://www.sevenmentor.com/ja....va-training-classes-