Before Java 9, creating immutable lists, sets, and maps required multiple lines of code using Arrays.asList(), Collections.unmodifiableList(), or new ...

Java 9 introduced new methods in the Stream API to improve functionality and efficiency. These enhancements include takeWhile(), dropWhile(), ...

The Collectors API (java.util.stream.Collectors) provides powerful tools for processing and collecting stream results, such as converting them into lists, ...

Before Java 8, handling null values was a common source of bugs and NullPointerException (NPE) errors. Java 8 introduced Optional<T>, a container object ...

Before Java 8, date and time handling in Java was done using java.util.Date and java.util.Calendar, which had several problems:❌ Mutable objects – Modifying a ...

Before Java 8, interfaces in Java could only have abstract methods, meaning every implementing class had to provide an implementation for all methods. Java ...

The Streams API is one of the most powerful features introduced in Java 8. It allows you to process collections (Lists, Sets, Maps, etc.) in a functional and ...

Now that you understand lambda expressions, let’s explore functional interfaces, which are essential for using lambdas effectively. 1. What is a ...

What is a Lambda Expression? A Lambda Expression is a shorthand way to define anonymous functions (functions without a name). It allows you to write ...

Java 8 (2014) – The Most Impactful Update Lambda Expressions – Enables functional-style programming. Functional Interfaces – Introduced ...