package com.test.string;

public class StringUtils {

 //1.統計一個字串在另一個字串中出現的次數
 public static int stringCount(String str,String key){
  int index=0;
  int count=0;
  while((index=str.indexOf(key))!=-1){
   str=str.substring(index+key.length());
   count++;
  }
  
  return count;
 }
 
 public static void main(String[] args) {
  String str="adfdfdgdfdsfsdwerer";
  String key="d";
  int count=stringCount(str,key);
  System.out.println(count);
 }
}