Collect and Convert Objects using Lambda Expression in Java 8 or Later Version

Introduction In this tutorial, I will show you how you are going to collect and convert objects using lambda expression in Java 8 stream API. I will collect objects and map to another custom objects using Java 8 stream API with the help of Lambda Expression. Suppose you have entity classes generated from your database tables and after fetching data from database tables you want to apply some logic and want to map to custom Data Transfer Objects.

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Java forEach example using Lambda Expression

This tutorial will show you how to use Java 8 forEach loop to iterate Collection using Lambda Expression. Prior to Java 8 or JDK 8 we used to use the for loop though it was for-each style but in Java 8 the inclusion of forEach loop simplifies the iteration process in mainly one line. Let’s look at the below example to see how it can be used and how simple it is using Java forEach loop.

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Java Lambda Expressions

Introduction When implementation of anonymous class is very simple, for example, an interface contains only one method, then the syntax of anonymous classes may seem unclear. In this situation the functionality is passed as an argument to another method to perform an action, for example, when someone clicks on a button. Lambda expressions enable to treat functionality as a method argument, or code as data. Over the years mainly two features have profoundly reshaped the Java language, fundamentally changing the way that code is written. The first was the addition…

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