单选题
下列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(sring[] args){
sting text=
“ An array is a data structur that stores a collection of”
+ “values of the same type . You access each individual 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 idex = -1;
Sting arrarStr =”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”);
}
}