IntStream summaryStatistics() in Java 8

By Atul Rai | Last Updated: March 18, 2024 Previous       Next

In Java 8, the IntStream interface provides the summaryStatistics() method, which returns an IntSummaryStatistics object describing various summary statistics for the elements of the stream. This includes the count, sum, min, max, and average.

Here’s how you can use IntStream and summaryStatistics() method with an example:

package org.websparrow.stream;

import java.util.IntSummaryStatistics;
import java.util.stream.IntStream;

public class IntStreamExample {

    public static void main(String[] args) {

        // Creating an IntStream
        IntStream numbersStream = IntStream.of(1, 2, 3, 4, 5, 6, 7, 8, 9, 10);

        // Using summaryStatistics() to get statistics
        IntSummaryStatistics stats = numbersStream.summaryStatistics();

        // Printing statistics
        System.out.println("Count: " + stats.getCount());
        System.out.println("Sum: " + stats.getSum());
        System.out.println("Min: " + stats.getMin());
        System.out.println("Max: " + stats.getMax());
        System.out.println("Average: " + stats.getAverage());
    }
}

Related Posts:

1. Java Collections.min() and Collections.max() Methods
2. Java 8 Collectors.partitioningBy() Method Example
3. Java 8 Collectors.groupingBy() Method Example

Output:

Count: 10
Sum: 55
Min: 1
Max: 10
Average: 5.5

References

1. summaryStatistics() – JavaDoc
2. Class IntSummaryStatistics – JavaDoc