Lambda Expression

The lambda expression is one of the features of Java programming it is also known as an anonymous function that does not have a name, modifier, and return type, It was included in Java 8 version. It provides a clean and concise way to provide the implementation of a functional interface, The lambda expression is very useful in the collection: it helps to iterate, filter, and extract data from the collection.

An Interface that contains only one abstract method is known as a functional interface in Java. e.g. Runnable, callable, comparable

Rules :

• If the body of the lambda expression contains only one line of statement or code then curly braces are optional.
• Java compiler also inter the type of variable passed in arguments, hence type is optional in lambda expression.

?

Benefits :

• The Lambda expression reduces the lines of code.
• To write more readable, maintainable, and concise code
• Sequential and Parallel execution support by passing behavior as an argument in methods.
• Lambda is used to implement functional interfaces in a very simple and short manner.

Limitations:

• Lambda expression only works with the functional interface.
• Lambda expressions treat their parameters as effectively final, meaning they cannot be reassigned within the lambda body.
• We can not use the Lambda expression before the 8 version of Java.