What is stream api in Java?

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Stream API is a feature in Java that allows processing of collections of objects in a functional way.

Stream API provides a set of functional interfaces to perform operations on collections.
It supports operations like filter, map, reduce, and forEach.
It can be used with collections like List, Set, and Map.
Example: List names = Arrays.asList("John", "Mary", "Bob"); names.stream().filter(name -> name.startsWith("J")).forEach(System.out::println);
Example: List numbers = Arrays.asList(1, 2, 3, 4, 5); int sum = numbers.stream().reduce(0, (a, b) -> a + b);
Example: Map ages = new HashMap<>(); ages.put("John", 30); ages.put("Mary", 25); ages.entrySet().stream().filter(entry -> entry.getValue() > 26).forEach(System.out::println);

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