Java DoubleSummaryStatistics getAverage()方法及示例

Java中DoubleSummaryStatistics类 的 getAverage() 方法用于获取该DoubleSummaryStatistics中记录的平均值。

语法。

public double getAverage()

参数。此方法不接受任何值作为参数。

返回值。该方法返回该DoubleSummaryStatistics中记录的平均值。

程序。

// Java program to demonstrate
// the above method
  
import java.util.*;
  
public class DoubleSummaryStatisticsDemo {
    public static void main(String[] args)
    {
  
        DoubleSummaryStatistics doubleSummaryStatistics
            = new DoubleSummaryStatistics();
  
        List<Double> list = new LinkedList<>();
        list.add(95.7);
        list.add(234.6767);
        list.add(243.5);
        list.add(50.0);
        list.add(45.6);
        list.add(45664.0);
        list.add(7007.777);
        list.add(5677.0);
        list.add(0.0);
        list.add(45664.7);
  
        Iterator<Double> iterator = list.listIterator();
        while (iterator.hasNext()) {
  
            // Add the doubles to the
            // DoubleSummaryStatistics object
            doubleSummaryStatistics
                .accept(iterator.next());
        }
  
        System.out.println(doubleSummaryStatistics
                               .toString());
  
        System.out.println("The average of values is "
                           + doubleSummaryStatistics
                                 .getAverage());
    }
}

输出。

DoubleSummaryStatistics{count=10, sum=104682.953700, min=0.000000, average=10468.295370, max=45664.700000}
The average of values is 10468.29537

参考: https://docs.oracle.com/javase/10/docs/api/java/util/DoubleSummaryStatistics.html#getAverage()