Java Stream Collectors summingInt(), summingLong(), summingDouble()

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…

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Java Stream Collectors averagingInt(), averagingLong(), averagingDouble()

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…

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Summarizing Collectors in Java Stream

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…

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