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Functional interfaces provide a single abstract method for functional programming in Java.
Functional interfaces allow for lambda expressions and method references to be used as instances of the interface.
Interfaces with multiple abstract methods cannot be used for lambda expressions.
Example: java.util.function.Function is a functional interface with a single abstract method apply().
Java 8 introduced new features like lambda expressions, streams, functional interfaces, and default methods.
Lambda expressions: Allows writing concise code by enabling functional programming.
Streams: Provides a way to work with sequences of elements efficiently.
Functional interfaces: Interfaces with a single abstract method, used for lambda expressions.
Default methods: Allows adding new methods to interfaces without br
Yes, one functional interface can extend another interface in Java.
Functional interfaces can extend other functional interfaces in Java.
The child interface can have only one abstract method, but can inherit default methods from the parent interface.
Example: interface Parent { void method1(); } interface Child extends Parent { void method2(); }
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