6.7-3将数组arr中索引值为2的元素替换为“bb”

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package shuzu;   import java.util.Arrays;   public class TH {       public static void main(String[] args) {         // TODO Auto-generated method stub           String arr[] = {"qq","ww","ee"};         for(String x : arr)         {             System.out.println("替换前数组arr中元素有："+x);         }         Arrays.fill(arr,2,3,"bb");         for(String x : arr)         {             System.out.println("替换前数组arr中元素有："+x);         }     }   }