13. 'Consumer' Functional Interface - Java Interview

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In this series we will be covering all Java interview questions and answers. This is going to be comprehensive list of Java interview questions which can help experienced Java developers to prepare for an interview as well as upskilling the Java knowledge.

I would always recommend everyone to watch Durga Sir (durgasoft) videos because of extensive in depth explaination on all topics if you have more time.
But here we will try to cover important aspects of Java Programming which are always asked in interviews withing less time.

One of the key features of the Consumer interface is its ability to be used with lambda expressions or method references. This makes it easy to write concise and expressive code when working with collections or performing batch operations. By implementing the accept method of the interface, developers can define the desired behavior for processing the input object.

The Consumer interface is commonly used in scenarios where the focus is on performing side effects or modifying the state of objects without returning any values. For example, it can be used to iterate over a list of objects and perform a specific action on each element, such as printing its contents or updating its properties.

Another advantage of the Consumer interface is its compatibility with other functional interfaces in the Java API. It can be used in combination with interfaces like Predicate or Function to create more complex functional pipelines. This allows for a flexible and modular approach to designing code that adheres to functional programming principles.

Overall, the Consumer predefined functional interface in Java provides a convenient way to work with operations that require only an input object and perform some action on it. Its flexibility, compatibility with other functional interfaces, and ability to be used with lambda expressions make it a valuable tool for writing expressive and concise code in Java applications.