JAVA求数组平均值

可以使用Java中的可变参数来编写一个只册姿需要一个方法即可计算任核基意数改姿谨量数组的平均值的函数：

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public static double a1(double[]... arrays) {

double sum = 0

int count = 0

for (double[] array : arrays) {

for (double value : array) {

sum += value

count++

}

}

return sum / count

}

然后可以使用以下代码来调用该方法，并将结果赋给对应的变量：

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double a2, b2, c2, d2

double a[] = {90, 85, 66, 51, 69, 78, 88, 94}

double b[] = {68, 88, 81, 90, 65, 74, 64, 46}

double c[] = {68, 90, 85, 88, 68, 70}

double d[] = {60}

a2 = b2 = c2 = d2 = a1(a, b, c, d)

这样就可以使用一次方法调用计算所有数组的平均值了。

package test

import java.util.List

public interface Average{

public double getAverage(List<Double>list)

}

package test

import java.util.List

public class First implements Average {

public double getAverage(List<Double>list) {

double sum = 0

for(int i=0i<链哗察list.size()i++){

sum += list.get(i).doubleValue()

}

return sum / list.size()

}

}

package test

import java.util.Collections

import java.util.List

public class Second implements Average {

public double getAverage(List<Double>list) {

Collections.sort(list)

double sum = 0

for(int i=1i<list.size()-1i++){

sum += list.get(i).doubleValue()

}

return sum / (list.size() - 2)

}

}

package test

import java.util.ArrayList

import java.util.List

public class Test {

public static void main(String[] args){

List<Double>list = new ArrayList<Double>()

list.add(50d)

list.add(48d)

list.add(20d)

list.add(51d)

list.add(36d)

Average first = new First()

Average second = new Second()

System.out.println(first.getAverage(list))

System.out.println(second.getAverage(list))

}

}

为了测试，我只输入了5个数，棚茄录入的代码网芦唤上很多，算法给出了，祝你好运。

public class MaxMin {

public static void main(String[] args) {

Integer[] inte = {12,23,54,75,86}

int max = inte[0]

int min = inte[0]

int average = 0

int sum = 0

for(int i=0i<inte.lengthi++){

if(max<inte[i]){

max = inte[i]

}

if(min>春早睁inte[i]){

min = inte[i]

}

sum += inte[i]

}

average = sum/inte.length

System.out.println("最大值----"+max)

System.out.println("扒岁最小值----"睁基+min)

System.out.println("平均值----"+average)

}

}

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