小编Har*_*hit的帖子

最近我遇到了这段代码，我真的很想了解何时以及如何使用这个 args.length

import java.util.*; 

class Average
{

public static void main(String args[])

{

Scanner sc = new Scanner(System.in);

int choice;

int a=0,min=0,max=0,x;

int n = args.length;

System.out.println("1-Sum");

System.out.println("2-Average");

System.out.println("3-Minimum");

System.out.println("4-Maximum");

System.out.println("enter your choice");

choice = sc.nextInt();

for(int i=0;i<n;i++)
{

a+=Integer.parseInt(args[i]);

}

switch(choice)

{

case 1: System.out.println("The sum is :" +a/n);

break

case 2: System.out.println("The Average is :" +a/n);

break

case 3: for(int i=0;i<n-1;i++)

{

x=Integer.parseInt(args[i]);

if(x<Integer.parseInt(args[i+1]))

min=x;

else min=Integer.parseInt(args[i+1]);

}

System.out.println("The minimum is :" +min);

break;

case 4: for(int i=0;i<n-1;i++) …