Can already closed data streams (Streams) in Java be reused?

In Java, data streams (Streams) cannot be reused after they have been closed or used. A stream can only be traversed once — after a terminal operation, it is considered closed.

If you try to reuse a stream, for example, by calling a terminal operation a second time, an IllegalStateException will be thrown.

To work with the data again, you need to create a new stream from the original source, for example:

List<String> list = Arrays.asList("a", "b", "c");
Stream<String> stream = list.stream();
stream.forEach(System.out::println); // first pass

// For the second pass, create a new stream
list.stream().forEach(System.out::println);

Thus, streams in Java are single-use and not intended for reuse.