Java 9 introduced List.of() and List.copyOf() to easily create immutable lists.
Source Code
List immutableList = List.of("Java", "Python", "C++");
System.out.println(immutableList); // Outputs: [Java, Python, C++]
List copyOfList = List.copyOf(immutableList);
System.out.println(copyOfList); // Outputs: [Java, Python, C++]
Use List.of() and List.copyOf() for creating unmodifiable lists from elements or other collections. It’s a convenient way to create fixed-size lists or to make a snapshot of a current collection state.
By understanding these foundational concepts, beginners can start building more complex Java applications with confidence, ensuring a solid grasp of the language’s capabilities and best practices.
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