double summary 统计将 Java 中的()方法与示例结合起来
原文:https://www . geesforgeks . org/double summarystatistics-将 java 中的方法与示例结合/
Java 中双概要统计类的 combine() 方法用于将给定的其他双概要统计组合到这个双概要统计中。
语法:
public void combine(DoubleSummaryStatistics
otherDoubleSummaryStatistics)
参数:此方法接受其他双汇总统计作为要合并到此双汇总统计中的参数。
返回值:这个方法不返回任何东西。
异常:如果 otherDoubleSummaryStatistics 为空，该方法抛出 空指针异常 。
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);
Iterator<Double> iterator = list.listIterator();
while (iterator.hasNext()) {
// Add the doubles to the
// DoubleSummaryStatistics object
doubleSummaryStatistics
.accept(iterator.next());
}
System.out.println("First DdoubleSummaryStatistics: "
+ doubleSummaryStatistics
.toString());
DoubleSummaryStatistics otherDoubleSummaryStatistics
= new DoubleSummaryStatistics();
List<Double> list1 = new LinkedList<>();
list1.add(45664.0);
list1.add(7007.777);
list1.add(5677.0);
list1.add(0.0);
list1.add(45664.7);
Iterator<Double> iterator1 = list1.listIterator();
while (iterator1.hasNext()) {
// Add the doubles to the
// DoubleSummaryStatistics object
otherDoubleSummaryStatistics
.accept(iterator1.next());
}
System.out.println("Second DdoubleSummaryStatistics: "
+ otherDoubleSummaryStatistics
.toString());
System.out.println("Combining both DdoubleSummaryStatistics"
+ " using combine() ");
doubleSummaryStatistics.combine(otherDoubleSummaryStatistics);
System.out.println("Combined DdoubleSummaryStatistics: "
+ doubleSummaryStatistics.toString());
}
}
Output:
第一个 dddoublesummarystatistics: DoubleSummaryStatistics { count = 5，sum=669.476700，min=45.600000，average=133.895340，max=243.500000} 第二个 dddoublesummarystatistics: DoubleSummaryStatistics { count = 5，sum=104013.477000，min = 0.000000，average = 20000
使用 combine()合并两个 DdoubleSummaryStatistics
组合 dddoublesummarystatistics: DoubleSummaryStatistics { count = 10，sum=104682.953700，min=0.000000，average=10468.295370，max=45664.700000}
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