File Name:  Kamikuto1.java
Description: This program uses Switch Statements and Multiple Sub-Classes to covert numbers to words.
Output: Converting numbers to words.

Program:

public  class  Kamikuto1{

private double getPlace( String number ){ switch( number.length() ){

case  1:
return DefinePlace.UNITS; 
case 2:
return DefinePlace.TENS; 
case 3:
return DefinePlace.HUNDREDS; 
case 4:
return DefinePlace.THOUSANDS; 
case 5:
return DefinePlace.TENTHOUSANDS; 
case 6:
return DefinePlace.MILLIONS; //return DefinePlace.LAKHS;
case  7:
return DefinePlace.TENMILLIONS; //return DefinePlace.TENLAKHS;
case  8:
return DefinePlace.BILLIONS; //return DefinePlace.CRORES;
case  9:
return DefinePlace.TENBILLIONS; //return DefinePlace.TENCRORES;

}//switch return 0.0; }// getPlace

private String getWord( int number ){ switch( number ){
case  1:
return "One"; 
case 2:
return  "Two";
case  3:
return "Three"; 
case 4:
return "Four"; 
case 5:
return "Five"; 
case 6:
return "Six"; 
case 7:
return "Seven"; 
case 8:
return "Eight"; 
case 9:
return "Nine"; 
case 0:
return "Zero"; 
case 10:
return "Ten"; 
case 11:
return "Eleven"; 
case 12:
return "Twelve"; 
case 13:
return "Thirteen"; 
case 14:
return "Forteen"; 
case 15:
return "Fifteen"; 
case 16:
return "Sixteen"; 
case 17:
return "Seventeen"; 
case 18:
return "Eighteen"; 
case 19:
return "Ninteen"; 
case 20:
return "Twenty"; 
case 30:
return "Thirty"; 
case 40:
return "Forty"; 
case 50:
return "Fifty"; 
case 60:
return "Sixty"; 
case 70:
return "Seventy"; 
case 80:
return "Eighty"; 
case 90:
return "Ninty"; 
case 100:
return  "Hundred";
} //switch return ""; } //getWord 

private String cleanNumber( String number ){ String cleanedNumber = "";

cleanedNumber = number.replace( '.', ' ' ). replaceAll( " ", "" );
cleanedNumber = cleanedNumber.replace( ',', ' ' ).replaceAll( " ", "" );
if( cleanedNumber.startsWith( "0" ) ) cleanedNumber = cleanedNumber.replaceFirst( "0",
""  );

return cleanedNumber; } //cleanNumber

public String convertNumber( String number ){ number = cleanNumber( number );
double num = 0.0; try{
num = Double.parseDouble( number ); }catch( Exception e ){

return "Invalid Number Sent to Convert"; } //catch

String returnValue = ""; while( num > 0 ){ number = "" + (int)num;
double  place  =  getPlace(number);

if( place == DefinePlace.TENS || place == DefinePlace.TENTHOUSANDS || place == DefinePlace.TENMILLIONS || place == DefinePlace.TENBILLIONS ){
//if( place == DefinePlace.TENS || place == DefinePlace.TENTHOUSANDS || place ==
//DefinePlace.TENMILLIONS || place == DefinePlace.TENCRORES ){

int subNum = Integer.parseInt( number.charAt(0) + "" + number.charAt(1) );

if( subNum >= 21 && (subNum%10) != 0 ){ returnValue += getWord( Integer.parseInt( "" +
number.charAt(0) ) * 10 ) + " " + getWord( subNum%10 ) ; } //if
else{
returnValue += getWord(subNum); }//else

if( place == DefinePlace.TENS ){ num = 0;
}//if
else if( place == DefinePlace.TENTHOUSANDS ){ num -= subNum * DefinePlace.THOUSANDS; returnValue += " Thousand ";

}//if
else if( place == DefinePlace.TENMILLIONS ){ num -= subNum * DefinePlace.MILLIONS; returnValue += " Million ";

}//if
else if( place == DefinePlace.TENBILLIONS ){ num -= subNum * DefinePlace.BILLIONS; returnValue += " Billion ";

//}//if
//else if( place == DefinePlace.TENLAKHS ){ //num -= subNum * DefinePlace.LAKHS; //returnValue += " Lakhs ";

//}//if
//else if( place == DefinePlace.TENCRORES ){ //num -= subNum * DefinePlace.CRORES; //returnValue += " Crores ";

}//if }//if else{

int  subNum  =  Integer.parseInt(  ""  +  number.charAt(0)  );

returnValue += getWord( subNum ); if( place == DefinePlace.UNITS ){ num = 0;
}//if
else  if(  place  ==  DefinePlace.HUNDREDS  ){

num -= subNum * DefinePlace.HUNDREDS; returnValue += " Hundred ";
}//if
else if( place == DefinePlace.THOUSANDS ){ num -= subNum * DefinePlace.THOUSANDS; returnValue += " Thousand ";

}//if
else if( place == DefinePlace.MILLIONS ){ num -= subNum * DefinePlace.MILLIONS; returnValue += " Million ";

}//if
else if( place == DefinePlace.BILLIONS ){ num -= subNum * DefinePlace.BILLIONS; returnValue += " Billion ";

//}//if
//else if( place == DefinePlace.LAKHS ){ //num -= subNum * DefinePlace.LAKHS; //returnValue += " Lakh ";

//}//if
//else if( place == DefinePlace.CRORES ){ //num -= subNum * DefinePlace.CRORES; //returnValue += " Crore ";

}//if }//else }//while
return returnValue; }//convert number

public static void main( String args[] ){ Kamikuto1 cv = new Kamikuto1();

if(  args.length  >=  1  )
{
for( int i=0; i<args.length; i++ ) System.out.println( "Given Number : " + args[i] +
"\nConverted: " + cv.convertNumber(args[i]) + "\n\n" ); System.exit(0);
}

System.out.println( "Given Number : 999999999\nConverted: " + cv.convertNumber("999999999") + "\n\n" );
}//main } //class

class  DefinePlace{
public  static  final  double  UNITS  =  1;
public static final double TENS = 10 * UNITS; public static final double HUNDREDS = 10 * TENS;
public static final double THOUSANDS = 10 * HUNDREDS; public static final double TENTHOUSANDS = 10 * THOUSANDS;
public static final double MILLIONS = 10 * TENTHOUSANDS;
public  static  final  double  TENMILLIONS  =  10  *  MILLIONS;
public static final double BILLIONS = 10 * TENMILLIONS; 
public static final double TENBILLIONS = 10 * BILLIONS;
//public static final double LAKHS = 10 * TENTHOUSANDS; 
//public static final double TENLAKHS = 10 * LAKHS; 
//public static final double CRORES = 10 * TENLAKHS; 
//public static final double TENCRORES = 10 * CRORES;

}  //class

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