Java Functional Programming : This Java Programming Trick Will Save You Hours

LAMDA EXPRESSION

Lambda was introduced in Java 8, providing us with a clear and concise way to implement a single-method interface using Lambda Expressions. Lambda Expressions are useful for working with Collections, especially for filtering, mapping, and iterating over data

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As we saw in the previous example, without using Lambda Expressions, we need to implement many interface methods. However, by using Lambda Expressions, we can treat them as method arguments. To implement a method with a Lambda Expression, you can use the syntax (parameters) -> expression if the method has parameters or () -> expression if the method has no parameters.

METHOD REFERENCE

It is a shorthand notation for lambda expressions to call a method using the :: notation.