Question

所以我已经解决了这个问题一段时间了，它是一段代码，用来显示已经从用户收集和分类的数据。首先发布代码而不是发布错误。

import java.util.Scanner;
import java.util.*;
public class project3
{
   private static double[] payrate;
   private static String[] names;


   public static void SortData(double payrate[])
    {
         int first;
         int temp;
         int i;
         int j;
         for(i = payrate.length - 1; i > 0; i--)
         {
            first = 0;
            for(j = 1; j<=i;j++)
            {
               if(payrate[j]<payrate[first])
               first = j;
            }
            temp = (int)payrate[first];
            payrate[first] = payrate[i];
            payrate[i] = temp; 
         } 
    }

   public static void GetData()
   {

    Scanner input = new Scanner(System.in);
     System.out.println("How many names do you want to enter?");
                String strNum = input.nextLine();
                int num = Integer.parseInt(strNum);
                int array[] = new int[num];
                for (int i = 0  ; i < array.length ; i++ ) 
                    {
                        names = new String[num];


                        System.out.println("enter employee's name: ");

                        names[i] = input.nextLine(); 
                        //while(names[i].length < 2)
                        //{
                           //System.out.println("enter valid employee's name: ");

                        //names[i] = input.nextLine(); 
                        //} 

                    }
                for(int j = 0; j < array.length;j++)
                    {
                        payrate = new double[num];
                        System.out.println("enter employee's payrate: ");
                        payrate[j] = input.nextDouble();
                        while(payrate[j] > 100 || payrate[j] < 0)
                        {
                           System.out.println("enter valid employee's payrate: ");
                           payrate[j] = input.nextDouble();
                        }


                     }


   }
        public static void DisplayData(double payrate[], String names[])
    {
         int locationsum = 0;
         for (int l=1; l<=names.length; l++) 
         {

            locationsum = 0;

           locationsum+=payrate[l];
           }

           for(int i=0;i<names.length;i++)
           {
              System.out.print(names[i]);

           System.out.printf("%6d\n", locationsum);

           } 

    }

    public static void main(String[] args)
   {
      GetData();
      SortData(payrate);
      DisplayData(payrate,names);

   }




}

我无法找到一种从阵列中打印出所有内容的方法，并且通过这种方式它不断给我这个。我得到的错误是：

Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: 2
    at project3.DisplayData(project3.java:77)
    at project3.main(project3.java:94)

Answer 1

在DisplayData方法中，您需要重复（包括）names.length：

for (int l=1; l<=names.length; l++)

数组索引从零开始，这意味着第一个索引始终为零，最后一个索引为length-1。尝试访问length处的索引将为您提供ArrayOutOfBoundsException，因为任何数组都不存在该索引。

Answer 2

将for (int l = 1; l <= names.length; l++)更改为for (int l = 1; l < names.length; l++)。

数组出现问题，索引超出范围异常

2 个答案: