private static void intToEnglish(int i, StringBuffer result) {
if (i < 0) {
result.append("minus ");
i = -i;
}
if (i >= 1000000000) { // billions
intToEnglish(i / 1000000000, result);
result.append("billion, ");
i = i % 1000000000;
}
if (i >= 1000000) { // millions
intToEnglish(i / 1000000, result);
result.append("million, ");
i = i % 1000000;
}
if (i >= 1000) { // thousands
intToEnglish(i / 1000, result);
result.append("thousand, ");
i = i % 1000;
}
if (i >= 100) { // hundreds
intToEnglish(i / 100, result);
result.append("hundred ");
i = i % 100;
}
if (i >= 20) {
switch (i / 10) {
case 9:
result.append("ninety");
break;
case 8:
result.append("eighty");
break;
case 7:
result.append("seventy");
break;
case 6:
result.append("sixty");
break;
case 5:
result.append("fifty");
break;
case 4:
result.append("forty");
break;
case 3:
result.append("thirty");
break;
case 2:
result.append("twenty");
break;
}
i = i % 10;
if (i == 0) result.append(" ");
else result.append("-");
}
switch (i) {
case 19:
result.append("nineteen ");
break;
case 18:
result.append("eighteen ");
break;
case 17:
result.append("seventeen ");
break;
case 16:
result.append("sixteen ");
break;
case 15:
result.append("fifteen ");
break;
case 14:
result.append("fourteen ");
break;
case 13:
result.append("thirteen ");
break;
case 12:
result.append("twelve ");
break;
case 11:
result.append("eleven ");
break;
case 10:
result.append("ten ");
break;
case 9:
result.append("nine ");
break;
case 8:
result.append("eight ");
break;
case 7:
result.append("seven ");
break;
case 6:
result.append("six ");
break;
case 5:
result.append("five ");
break;
case 4:
result.append("four ");
break;
case 3:
result.append("three ");
break;
case 2:
result.append("two ");
break;
case 1:
result.append("one ");
break;
case 0:
result.append("");
break;
}
}
private static String intToEnglish(int i) {
StringBuffer result = new StringBuffer();
intToEnglish(i, result);
return result.toString();
}