How do the use of Optional and null checks with if/else differ when handling potential missing values?

Using Optional in Java is a more modern and expressive way to handle potential null values compared to traditional null checks with if/else.

Differences:

• Explicit intent: Optional explicitly indicates that a value may be absent, whereas null is just the absence of an object, which is not always obvious.
• Safety: Optional helps avoid NullPointerException by forcing the developer to handle the absence explicitly.
• Functional style: Optional provides methods (map, filter, orElse, ifPresent, etc.) for convenient chaining of operations without explicit null checks.
• Cleaner code: Using Optional reduces the number of conditional operators and improves readability.

Example:

Optional<String> optionalName = Optional.ofNullable(getName());

// Instead of if (name != null) ...
optionalName.ifPresent(name -> System.out.println("Name: " + name));

// Or get the value with a default
String name = optionalName.orElse("Unknown");

While null checks with if (obj != null) are a lower-level and less expressive way, Optional provides a safer and more readable alternative.