Java ArrayOutOfBoundsException

Question

我似乎无法弄清楚为什么java在这里抛出数组索引超出范围的异常：

package for_John;

import java.util.Arrays;

public class merge { 
    public static void addArray(int iid[], String phen[]){ 
        int i=0;
        int j=0; 
        int x=0; 

        for(x=0; x<5; x++) {    
            while(iid[i] == iid[++i] && i <= phen.length){
                i=i+1;
            }

            System.out.println(Arrays.toString((Arrays.copyOfRange(phen, j, i))));
            j=i;
            i=i+1;
        }
    }

    public static void main(String[] args) { 
        int iid[]={1,1,1,3,3,3,3,4,4,6,6,7,7,7,8,8};
        String phen[]={"a","b","c","w","n","f","h","g","y","u","u","l","l","l","k","p"}; 
        addArray(iid, phen);
    }
} 

在异常之前输出看起来很好：

      Output: [a, b, c]
              [w, n, f, h]
              [g, y]
              [u, u]

Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: 16
at for_John.merge.addArray(merge.java:12)
at for_John.merge.main(merge.java:22) 

非常感谢任何帮助！

Answer 1

在致电i之前，您应该检查iid.length是大于还是等于iid[++i]。

你可以这样做：

while (iid[i] == iid[++i] && i <= phen.length) {
            i = i + 1;
            if (i + 1 >= iid.length) {
                break;
            }
        }