String subString方法

package 字符串2;

public class TestString {

public static void main(String[] args) {   String str = "Returns a new character sequence that is a subsequence of this sequence";      int count = 0;   int index = 0;   String strTofind = "sequence";   while((index = str.indexOf(strTofind))!=-1){    count++;    str = str.substring(index+strTofind.length());   }      System.out.println("str字符串中所含的sequence子串的个数："+count);  }

}