Java provides several ways to initialize a HashMap directly, making your code more concise and readable. In this blog post, we’ll explore different methods to create and populate a HashMap in one go using Java. 1. Using Map.of () (Java 9+) For small, immutable maps, you can use the Map.of() method:

Java 17 offers multiple ways to initialize a HashMap directly. Choose the method that best fits your use case, considering factors like mutability, number of entries, and readability. Remember that methods like Map.of() and Map.ofEntries() create immutable maps, while others allow for mutable maps. Happy coding!

HashMap map is initialized and populated with key-value pairs. This approach is suitable for creating immutable maps that remain constant throughout the program's execution. 2. Initialize HashMap Using Collections

The Static Initializer for a Static HashMap We can initialize a HashMap using a static block of code: static { articleMapOne = new HashMap <>(); articleMapOne.put("ar01", "Intro to Map"); articleMapOne.put("ar02", "Some article"); The advantage of this kind of initialization is that the map is mutable, but it will only work for static.