Money converter

AmountConverter is a generalized class which contains methods for getting the amount into words depending on the Indian or foreign Currency as well.

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package fos; import fos.ReportsConstants; public class AmountConverter {  private static AmountConverter instance = null;  //public static String CURRENCY_INR = FOSConstants.LOCAL_CURR_CD;  public static String CURRENCY_INR = "INR";//Indian rupees     /**   * Method getInstance.   * @return AmountConverter   */  public static AmountConverter getInstance(){   if(null == instance){    instance = new AmountConverter();   }   return instance;  }     /**   * Ref 001   * Method getAmountInWords returns the amount in word   * for a number input in BSES format.   * @param astrAmount   * @return String   */  public String getAmountInWords(String astrAmount, String strCurrCd){   StringBuffer sbfAmtInWords = new StringBuffer();   char ch;   if (strCurrCd.equals(CURRENCY_INR)){    sbfAmtInWords.append(ReportsConstants.RUPEES);   }else{    sbfAmtInWords.append(strCurrCd);   }   sbfAmtInWords.append(ReportsConstants.SPACE);       for (int i = 0; i < astrAmount.length(); i++) {    ch = astrAmount.charAt(i);    switch (ch) {     case '0':      sbfAmtInWords.append(ReportsConstants.ZERO);      sbfAmtInWords.append(ReportsConstants.SPACE);      break;     case '1':      sbfAmtInWords.append(ReportsConstants.ONE);      sbfAmtInWords.append(ReportsConstants.SPACE);      break;     case '2':      sbfAmtInWords.append(ReportsConstants.TWO);      sbfAmtInWords.append(ReportsConstants.SPACE);      break;     case '3':      sbfAmtInWords.append(ReportsConstants.THREE);      sbfAmtInWords.append(ReportsConstants.SPACE);      break;     case '4':      sbfAmtInWords.append(ReportsConstants.FOUR);      sbfAmtInWords.append(ReportsConstants.SPACE);      break;     case '5':      sbfAmtInWords.append(ReportsConstants.FIVE);      sbfAmtInWords.append(ReportsConstants.SPACE);      break;     case '6':      sbfAmtInWords.append(ReportsConstants.SIX);      sbfAmtInWords.append(ReportsConstants.SPACE);      break;     case '7':      sbfAmtInWords.append(ReportsConstants.SEVEN);      sbfAmtInWords.append(ReportsConstants.SPACE);      break;     case '8':      sbfAmtInWords.append(ReportsConstants.EIGHT);      sbfAmtInWords.append(ReportsConstants.SPACE);      break;     case '9':      sbfAmtInWords.append(ReportsConstants.NINE);      sbfAmtInWords.append(ReportsConstants.SPACE);      break;     case '.':      sbfAmtInWords.append(ReportsConstants.AND);      sbfAmtInWords.append(ReportsConstants.SPACE);      if (strCurrCd.equals(CURRENCY_INR)){       sbfAmtInWords.append(ReportsConstants.PAISE);      }else{       sbfAmtInWords.append(ReportsConstants.COINS);      }      sbfAmtInWords.append(ReportsConstants.SPACE);      break;     default :      break;    }   }   sbfAmtInWords.append(ReportsConstants.ONLY);   return sbfAmtInWords.toString();  }        public String getAmountInWords(String astrAmount){   return getAmountInWords(astrAmount, CURRENCY_INR);  } }