Course Content

  • Demo1
  • Demo1WithLambdaExpression

Course Content


You must either design your own functional interface or use the predefined functional interface given by Java to use lambda expression. Functional interfaces (also known as Single Abstract Method Interfaces) are interfaces that include only one abstract method, such as Runnable, Callable, and ActionListener.

An anonymous class can be replaced with a lambda expression (lambda). Lambdas make it easier to employ interfaces that declare only one abstract method. Functional interfaces are the name for these types of interfaces. A functional interface can have as many static and default methods as it needs.

In Java, any lambda expression is an object. It's a functioning interface in action.

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