java - 如何在 Userinput 上下文中处理 arrayindex 越界异常？

Question

String[] v=s.split(" ");//it is reading only first character into v[0], But the remaining Strings are getting omitted.

ex: Consider "1 1 2011" is given as user input. It is taking v[0]=1, but 
 v[1] and v[2] are being empty.

这是我得到的错误。

1 1 2011
Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: 1
    at com.techm.Magic.main(Magic.java:15)

package com.techm;

我的代码

import java.util.Scanner;

public class Magic {

    public static void main(String[] args) {
        // TODO Auto-generated method stub
        Scanner sc=new Scanner(System.in);
        String s=sc.next();
        int h=0;


        String[] v=s.split(" ");
         h=(Integer.parseInt(v[0])*Integer.parseInt(v[1]));

         String k=String.valueOf(h);
         int len=k.length();

         String d=v[2];
          int y=Integer.parseInt(d);
         int a=0;

         if(len==1)
         {
             a=y%10;

            if(h==a) 
                System.out.println("true");
            else
                System.out.println("false");
         }
         else if(len==2)
         {
             //d=s.substring(s.length()-2);
             a=y%100;
             if(h==a)
                 System.out.println("true");
             else
                 System.out.println("false");
         }

         else
         {
             //d=s.substring(s.length()-3);
             a=y%1000;
             if(h==a)
                 System.out.println("true");
             else
                 System.out.println("false");
         }   
        }
    }

标签： javaarraysexception

Answer 1

使用 String s=sc.nextLine()代替String s=sc.next()

我们需要使用nextLine()方法来读取字符串。