J Optional Results.md

Optional Results

Some terminal operations may not find a value. In that case, streams often return Optional instead of null.

Common examples:

• findFirst()
• findAny()
• max()
• min()

Example

var firstEven = List.of(1, 3, 5, 8, 10).stream()
        .filter(number -> number % 2 == 0)
        .findFirst();

System.out.println(firstEven.orElse(0));

Output

8

Using Optional makes missing values explicit and safer to handle.

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