java - 数组索引越界异常: 2

Question

当我进入导出后出现错误

Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: 2

我不擅长编程所以请多多包涵

import java.util.*;

public class Highway{

    public static void main(String[] args) {

        Scanner input = new Scanner(System.in);

        System.out.println("Total number of the exits");
        int p=input.nextInt();
        System.out.println("The first exit");
        int i=input.nextInt();
        System.out.println("The second exit");
        int j=input.nextInt();

        int[]A= new int[p];

        for(int w=0;w<=p;i++) {


            A[i]=(int )(java.lang.Math.random() * 20 + 1);
            System.out.println(A[w]);
        }
    }

    static void Distance(int i, int j, int[] A) {
    // a is the array of distance
    // this find the  distances between i and j
        int distance = 0;

        if(j>i){
        for(int k = i; k<=j;k++) {

                distance=distance+A[k];
        }

                distance=distance-A[i];

        }

        if(i>j){
            for (int m = j; m<=i; m++){distance=distance+A[m];
            }
                distance=distance-A[j];
            }

            System.out.println("The distance of the first"+i+" and second exit"+j+" is"+distance);

        }
}

Answer 1

你的循环迭代直到 p 包含在内，这就是你得到错误的地方!数组的大小是 p 并且您应该迭代的索引是 0,...,p-1 加上您递增 i 而不是 w.

修改:

for(int w=0;w<=p;i++)

到:

for(int w=0;w<p;w++)