In this tutorial you’ll see how to use Collectors.collectingAndThen() method with the help of some examples. Collectors.collectingAndThen() method in Java Stream As the name of the method itself suggests this method helps you to provide logic for two steps in a single method call. 1. How to collect stream elements.…
In the tutorial Java Stream Collectors averagingInt(), averagingLong(), averagingDouble() we saw how Collectors class in Java Stream API provides methods like Collectors.averagingInt(), Collectors.averagingLong(), Collectors.averagingDouble() to get average of Stream on Integers, Long and Double respectively. Same way if you want to quickly add the stream elements there are Collectors.summing() methods…
If you want average of Stream elements there are handy utility methods available in Collectors class to quickly do that, the methods are- Collectors.averagingInt()- To get average of stream of integers. Collectors.averagingLong()- To get average of stream of longs. Collectors.averagingDouble()- To get average of stream of doubles. Collectors.averaging methods in…
In the tutorial Java Stream allMatch() With Examples we discussed allMatch() method that returns true when all elements of this stream match the provided predicate. There is also a method noneMatch() in Java Stream API that checks whether no elements of this stream match the provided predicate. So noneMatch() can…
In the tutorial Java Stream anyMatch() With Examples we discussed anyMatch() method that returns true if any element matches the Predicate. There is also a method allMatch() in Java Stream API that checks whether all elements of this stream match the provided predicate. allMatch() Method in Java Syntax of allMatch()…
In Java Stream API anyMatch(Predicate<? super T> predicate) method is used to check whether any element of this stream matches the provided predicate. anyMatch() method in Java Syntax of anyMatch() method is as given below. boolean anyMatch(Predicate<? super T> predicate) Method returns a boolean value true if any element of…
In this tutorial you’ll learn about the different summarizing collectors in Java Stream API that returns a summary statistics Collectors. Summarizing collectors in Collectors class There are three summarizing collector methods in Collectors class which are as following- summarizingInt(ToIntFunction<? super T> mapper)– Returns a Collector which applies an int-producing mapping…
If you are writing a Java program to generate random numbers two tried and tested ways are to either use Math.random() method or methods of Random class to get a random number but the limitation with these methods is that they generate a single random number and you would need…
boxed() method in Java Stream is used to wrap the primitive value (int, long or double) to its respective wrapper class object. There are primitive specializations of Stream named IntStream, LongStream and DoubleStream each of these interfaces have a boxed() method that returns a Stream consisting of the elements of…
If you want to merge two streams you can use concat() method in Java Stream API. Syntax of concat() method concat(Stream<? extends T> a, Stream<? extends T> b) Here a represents the first stream and b represents the second stream. Method returns a stream consisting all the elements of the…
