在字符串中查找重复的字符并使用Java计算出现的次数

import java.io.*;public class CountChar {    public static void main(String[] args) throws IOException    {      String ch;      BufferedReader br=new BufferedReader(new InputStreamReader(System.in));      System.out.print("Enter the Statement:");      ch=br.readLine();      int count=0,len=0;        do        { try          {          char name[]=ch.toCharArray();   len=name.length;   count=0;   for(int j=0;j<len;j++)    {       if((name[0]==name[j])&&((name[0]>=65&&name[0]<=91)||(name[0]>=97&&name[0]<=123))) count++;    }   if(count!=0)     System.out.println(name[0]+" "+count+" Times");   ch=ch.replace(""+name[0],"");         }          catch(Exception ex){}        }        while(len!=1);   }}

输出量

Enter the Statement:asdf23123sfsdfa 1 Timess 3 Timesd 2 Timesf 3 Times