Question

Java 的代码，50行，要三个函数，要有循环

Java 的代码，50行，要三个函数，要有循环一定要有三个函数！循环！

Answer 1

随便给你写了一个
package com.wys.util;
import java.util.ArrayList;
import java.util.List;
import java.util.Random;
public class Test {
public static List<Integer> smallNumbers,largeNumbers;
public static int sum1 = 0,sum2 = 0;
public static void main(String[] args) {
smallNumbers = new ArrayList<Integer>();
largeNumbers = new ArrayList<Integer>();
run();
}
public static void run() {
int i = 0;
for (int j = 0; j < 50; j++) {
Random rand = new Random();
i = rand.nextInt(1000);
if (i<500) {
small(i);
}else{
large(i);
}
}
System.out.println("随机输出的50个数字中:");
System.out.println("大于500的数（包括500）共有"+largeNumbers.size()+"个");
System.out.print("他们是"+largeNumbers);
System.out.println();
System.out.println("他们的和是"+sum1);
System.out.println("小于500的数共有"+smallNumbers.size()+"个");
System.out.print("他们是"+smallNumbers);
System.out.println();
System.out.println("他们的和是"+sum2);
}
private static void large(int number) {
largeNumbers.add(number);
sum1 += number;
}
private static void small(int number) {
smallNumbers.add(number);
sum2 += number;
}
}

Answer 2

没有具体需求么 随便写？

追问

有实用功能的

dalao求

这边很急

追答

import java.util.Scanner;
public class Demo {
    public static void main(String args[]) {
        Scanner scanner = new Scanner(System.in);
        System.out.println("请输入一个开始数字：");
        int a = 0;
        try {
            a = scanner.nextInt();
        } catch (Exception e) {
            exception();
            return;
        }
        System.out.println("请输入一个结束数字：");
        int b = 0;
        try {
            b = scanner.nextInt();
        } catch (Exception e) {
            exception();
            return;
        }
       int sum = calculation(a,b);
        System.out.println(a+"到"+b+"累加的和为："+sum);
    }

    public static int calculation(int a, int b){
        int sum = 0;
        if (a > b) {
            for (int i = b; i <= a; i++) {
                sum = sum + i;
            }
        } else {
            for (int i = a; i <= b; i++) {
                sum = sum + i;
            }
        }
        return sum;
    }
    public static void exception(){
        System.out.println("输数字不合法!");
    }

这样行么