Initial data commit

Task/Number-names/Java/number-names-1.java

@@ -0,0 +1,78 @@
+public enum IntToWords {
+    ;
+
+    private static final String[] small = {
+            "", "one", "two", "three", "four",
+            "five", "six", "seven", "eight", "nine",
+            "ten", "eleven", "twelve", "thirteen", "fourteen",
+            "fifteen", "sixteen", "seventeen", "eighteen", "nineteen"};
+    private static final String[] tens = {
+            "", "", "twenty", "thirty", "forty",
+            "fifty", "sixty", "seventy", "eighty", "ninety"};
+    private static final String[] big = {
+            "", "thousand", "million", "billion", "trillion",
+            "quadrillion", "quintillion"};
+
+    public static void main(String[] args) {
+        System.out.println(int2Text(0));
+        System.out.println(int2Text(10));
+        System.out.println(int2Text(30));
+        System.out.println(int2Text(47));
+        System.out.println(int2Text(100));
+        System.out.println(int2Text(999));
+        System.out.println(int2Text(1000));
+        System.out.println(int2Text(9999));
+        System.out.println(int2Text(123_456));
+        System.out.println(int2Text(900_000_001));
+        System.out.println(int2Text(1_234_567_890));
+        System.out.println(int2Text(-987_654_321));
+        System.out.println(int2Text(Long.MAX_VALUE));
+        System.out.println(int2Text(Long.MIN_VALUE));
+    }
+
+    public static String int2Text(long number) {
+        StringBuilder sb = new StringBuilder();
+
+        if (number == 0) {
+            return "zero";
+        }
+
+        long num = -Math.abs(number);
+
+        int unit = 1;
+        while (true) {
+            int rem100 = (int) -(num % 100);
+            if (rem100 >= 20) {
+                if (rem100 % 10 == 0) {
+                    sb.insert(0, tens[rem100 / 10] + " ");
+                } else {
+                    sb.insert(0, tens[rem100 / 10] + "-" + small[rem100 % 10] + " ");
+                }
+            } else if (rem100 != 0) {
+                sb.insert(0, small[rem100] + " ");
+            }
+
+            int hundreds = (int) -(num % 1000) / 100;
+            if (hundreds != 0) {
+                sb.insert(0, small[hundreds] + " hundred ");
+            }
+
+            num /= 1000;
+            if (num == 0) {
+                break;
+            }
+
+            int rem1000 = (int) -(num % 1000);
+            if (rem1000 != 0) {
+                sb.insert(0, big[unit] + " ");
+            }
+            unit++;
+        }
+
+        if (number < 0) {
+            sb.insert(0, "negative ");
+        }
+
+        return sb.toString().trim();
+    }
+}