[单项选择题] 下面程序的功能是统计字符串中“array”的个数,在程序的空白处应填入的正确选项是 public class FindKeyWords{ public static void main(String[]args) { String text="An array is a data structur that stores a collection of" +"values of the same type. You access each indMdual value" +"through an integer index. For example,if a is an array" +"of inergers,then a[i]is the ith integer in the array."; int arrayCount=0; int index=-1; String arrayStr="array"; index=text.indexOf(arrayStr); while(index>=0) { ++arrayCount; index+=arrayStr.length(); index=text.indexOf(arrayStr,index); } System.out.println("the text contains"+arrayCount+"arrays"); } }
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