6sabcsssfsfs33 去掉ab3

  public static void main(String[] args)
  {
      String str="6sabcsssfsfs33";
      StringBuffer sbf = new StringBuffer();
      char[] chars = str.toCharArray();
     
      boolean[] removeChars =new boolean[256];
      for(int i=0;i<256;i++)
      {
          removeChars[i]=true;
      }
      removeChars['a'] = false;
      removeChars['b'] = false;
      removeChars['3'] = false;
     
      for(int i=0;i<chars.length;i++ )
      {
          if(removeChars[chars[i]])
          {
              sbf.append(chars[i]);
          }
      }
      System.out.println(sbf.toString());
  }