What is Lambda Expression in Java 8? In java, Lambda expression are introduced in java 8. Lambda is first step for Functional Programming. Lambda expression is just anonymous function or we can say nameless function. Java lambda expression are used to implement simple callback, event listener or functional programming with java stream API. Lambda expression is really helpful in collection library. It helps filter, iterate and get data from collection. Lambda expression is provide implementation of an interface which has Functional interface. Lambda expression is treated as function in java. We can say it is Lambda expression if function follows following condition :- Function does not have name Function does not have return type Function does not have modifiers Why we need Lambda Expression in Java? -> To enable Functional programming we need Lambda expression in Java. So, why we must use lambda expression. because of simple following advantage. Less code compare than simple
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