Java Stream forEach: Iterate and Manipulate Elements

Java's stream().forEach is a method designed to apply an operation to every element within a Stream. It offers a concise and efficient way to process elements in a collection. Typically, the operation is defined using a Lambda expression, which makes the code cleaner and easier to read.

For instance, consider a List collection. We can convert it into a Stream using the stream() method and then employ forEach to process each element. Let's demonstrate by printing each element in the list:

List<String> list = Arrays.asList('apple', 'banana', 'orange');
list.stream().forEach(item -> System.out.println(item));

The Lambda expression item -> System.out.println(item) instructs the forEach method to print each element. The output will be:

apple
banana
orange