Learn to join a stream of strings with a delimiter, prefix, and suffix using Collectors.joining(), String.join(), and append elements using StringBuilder.

The Java 8 Stream.concat() method merges two streams into one stream. The combined stream consists of all the elements of both streams.

Learn to convert stream to list using Collectors.toList() and Collectors.toCollection() APIs. This post contains multiple examples for collecting stream elements to list under different usecases.

Learn to collect Stream items into Map using Collectors.toMap() and Collectors.groupingBy() when Map keys are distinct or duplicates.

Java streams cannot be reused. Once a terminal operation is performed on a stream, it is considered consumed and cannot be reused.

Java Stream has two methods findFirst() and findAny() for retrieving elements. Learn the difference between both methods in parallel streams with examples.

Java Stream noneMatch(predicate) is a short-circuiting terminal operation to check if no element in the stream matches the given predicate.

Java Stream allMatch() is a short-circuiting terminal operation that is used to check if all the elements in the stream satisfy the provided predicate. 1. Stream allMatch() Method 1.1. Syntax Here predicate a non-interfering, stateless predicate to apply to all the elements of the stream. The allMatch() method returns always …

Java Stream anyMatch (Predicate predicate) is terminal-short-circuiting operation which is used to check if the stream contains any matching element with provided predicate.

Java 8 examples to create an infinite stream of elements. We will use Stream’s generate() and iterate() methods to get the infinite streams.

Java Stream skip(n) method returns a new stream consisting of the remaining elements of this stream, after the n elements have been skipped.

We can use Stream.limit(long) to retrieve elements while they must not be greater than a certain maximum count. Java 8 Stream limit() example

Java 8 Stream interface has peek(Consumer action) method which returns a new stream consists of all the elements of original stream after applying the method argument Consumer action.

The difference between map() vs flatMap() with example. map() is used for transformation only, but flatMap() is used for both transformation and flattening.

Learn to use Java Stream flatMap() method which is used to flatten a stream of collections to a stream of elements combined from all collections.

Learn to use Java Stream map() method which produces one output value of a different type ‘X’ for each input value of type ‘Y’.

Learn to use Stream min() method to select the smallest element in the stream according to the comparator provided in its argument.

Learn to use Stream.filter(Predicate) method to traverse all the elements and filter all items which match a given condition through Predicate argument. 1. Stream filter() Method The stream() method syntax is as follows: Predicate is a functional interface and represents the condition to filter out the non-matching elements from the …

Learn to use Stream.forEachOrdered(Consumer action) method to traverse all the elements and performs an action for each element of this stream, in the encounter order of the stream if the stream has a defined encounter order.

Learn to use Stream forEach(Consumer action) method to traverse all the elements of stream and performs an action for each element of this stream.