在Java中查找列表的平均值
要在Java中查找列表的平均值，代码如下-
示例
import java.util.*;
public class Demo {
public static void main(String []args){
List<Integer> list = Arrays.asList(10, 20, 50, 100, 130, 150, 200, 250, 500);
IntSummaryStatistics summaryStats = list.stream()
.mapToInt((a) -> a)
.summaryStatistics();
System.out.println("Average of a List = "+summaryStats.getAverage());
}
}输出结果
Average of a List = 156.66666666666666
现在让我们来看另一个例子-
示例
import java.util.*;
public class Demo {
public static void main(String []args){
List<Integer> list = Arrays.asList(10, 20, 50, 100, 130, 150, 200, 250, 500);
int sum = 0;
for (int i : list) {
sum+=i;
}
if(list.isEmpty()){
System.out.println("空列表！");
} else {
System.out.println("Average = " + sum/(float)list.size());
}
}
}输出结果
Average = 156.66667