Combining Strings with Delimiter using stream

We’re merging a list of strings into a single string using streams. The `words` list contains “Hello,” “world,” and “Java.” By applying the `joining` collector with a space delimiter, the elements are combined into the string `combined`, resulting in “Hello world Java.” Streams. make this process efficient and concise.

List<String> words = Arrays.asList("Hello", "world", "Java");
String combined = words.stream()
.collect(Collectors.joining(" "));

Filtering Prime Numbers with Streams