diff --git a/50_Horserace/java/Horserace.java b/50_Horserace/java/Horserace.java
new file mode 100644
index 000000000..9a5a7651b
--- /dev/null
+++ b/50_Horserace/java/Horserace.java
@@ -0,0 +1,313 @@
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.Random;
+import java.util.Scanner;
+
+/**
+ * HORSERACE
+ *
+ * Converted from BASIC to Java by Aldrin Misquitta (@aldrinm)
+ */
+public class Horserace {
+
+ private static final String[] horseNames = {
+ "JOE MAW",
+ "L.B.J.",
+ "MR.WASHBURN",
+ "MISS KAREN",
+ "JOLLY",
+ "HORSE",
+ "JELLY DO NOT",
+ "MIDNIGHT"
+ };
+ public static final int MAX_DISTANCE = 28;
+ public static final int NUM_HORSES = 8;
+
+ public static void main(String[] args) {
+ printHeader();
+
+ Scanner scanner = new Scanner(System.in);
+ Random random = new Random();
+
+ printHelp(scanner);
+
+ List betNames = readBetNames(scanner);
+
+ boolean donePlaying = false;
+ while (!donePlaying) {
+
+ int[] odds = generateOdds(random);
+ int sumOdds = Arrays.stream(odds).sum();
+ printOdds(sumOdds, odds);
+
+ Map bets = takeBets(scanner, betNames);
+
+ var horsePositions = runRace(horseNames.length, sumOdds, odds, random);
+
+ printRaceResults(horsePositions, bets, sumOdds, odds);
+
+ donePlaying = readDonePlaying(scanner);
+ }
+ }
+
+ private static int[] generateOdds(Random random) {
+ int[] odds = new int[NUM_HORSES];
+ for (int i = 0; i < NUM_HORSES; i++) {
+ odds[i] = (int) (10 * random.nextFloat() + 1);
+ }
+ return odds;
+ }
+
+ private static void printOdds(int R, int[] D) {
+ System.out.printf("%n%-28s%-14s%-14s%n%n", "HORSE", "NUMBER", "ODDS");
+ for (int n = 0; n < horseNames.length; n++) {
+ System.out.printf("%-28s% -14d%.6f :1%n", horseNames[n], n + 1, ((float) R / D[n]));
+ }
+ }
+
+ private static boolean readDonePlaying(Scanner scan) {
+ System.out.println("DO YOU WANT TO BET ON THE NEXT RACE ?");
+ System.out.print("YES OR NO? ");
+ String choice = scan.nextLine();
+ return !choice.equalsIgnoreCase("YES");
+ }
+
+ /**
+ * Simulate the race run, returning the final positions of the horses.
+ */
+ private static int[] runRace(int numberOfHorses, int sumOdds, int[] odds, Random random) {
+ int[] positionChange = new int[numberOfHorses];
+
+ System.out.println();
+ System.out.println("1 2 3 4 5 6 7 8");
+
+ int totalDistance = 0;
+ int[] currentPositions = new int[NUM_HORSES];
+ int[] horsePositions = new int[NUM_HORSES];
+
+ while (totalDistance < MAX_DISTANCE) {
+ System.out.println("XXXXSTARTXXXX");
+
+ for (int i = 0; i < numberOfHorses; i++) {
+ horsePositions[i] = i + 1;
+ positionChange[i] = calculatePositionChanges(sumOdds, odds[i], random);
+ currentPositions[i] += positionChange[i];
+ }
+
+ sortHorsePositionsBasedOnCurrent(currentPositions, horsePositions);
+
+ totalDistance = currentPositions[horsePositions[7] - 1];
+
+ boolean raceFinished = false;
+ int i = 0;
+ while (i < NUM_HORSES && !raceFinished) {
+ int distanceToNextHorse = currentPositions[(horsePositions[i] - 1)] - (i < 1 ? 0 : currentPositions[(horsePositions[i - 1] - 1)]);
+ if (distanceToNextHorse != 0) {
+ int a = 0;
+ while (a < distanceToNextHorse && !raceFinished) {
+ System.out.println();
+ if (currentPositions[horsePositions[i] - 1] >= MAX_DISTANCE) {
+ raceFinished = true;
+ }
+ a++;
+ }
+ }
+
+ if (!raceFinished) {
+ System.out.print(" " + horsePositions[i] + " "); // Print horse number
+ }
+ i++;
+ }
+
+ if (!raceFinished) {
+ //Print additional empty lines
+ for (int a = 0; a < MAX_DISTANCE - totalDistance; a++) {
+ System.out.println();
+ }
+ }
+
+ System.out.println("XXXXFINISHXXXX");
+ System.out.println("\n");
+ System.out.println("---------------------------------------------");
+ System.out.println("\n");
+ }
+
+ return horsePositions;
+ }
+
+ /**
+ * Sorts the horsePositions array in place, based on the currentPositions of the horses.
+ * (bubble sort)
+ */
+ private static void sortHorsePositionsBasedOnCurrent(int[] currentPositions, int[] horsePositions) {
+ for (int l = 0; l < NUM_HORSES; l++) {
+ int i = 0;
+ /*
+ uses a do-while instead of a for loop here, because in BASIC
+ a FOR I=1 TO 0 causes at least one execution of the loop
+ */
+ do {
+ if (currentPositions[horsePositions[i] - 1] >= currentPositions[horsePositions[i + 1] - 1]) {
+ int h = horsePositions[i];
+ horsePositions[i] = horsePositions[i + 1];
+ horsePositions[i + 1] = h;
+ }
+ i++;
+ } while (i < (7 - l));
+ }
+ }
+
+ private static int calculatePositionChanges(int r, int d, Random random) {
+ int positionChange = (int) (100 * random.nextFloat() + 1);
+
+ if (positionChange < 10) {
+ positionChange = 1;
+ } else {
+ int s = (int) ((float) r / d + 0.5);
+ if (positionChange < (s + 17)) {
+ positionChange = 2;
+ } else if (positionChange < s + 37) {
+ positionChange = 3;
+ } else if (positionChange < s + 57) {
+ positionChange = 4;
+ } else if (positionChange < s + 77) {
+ positionChange = 5;
+ } else if (positionChange < s + 92) {
+ positionChange = 6;
+ } else {
+ positionChange = 7;
+ }
+ }
+
+ return positionChange;
+ }
+
+ private static void printRaceResults(int[] m, Map bets, int r, int[] d) {
+ System.out.println("THE RACE RESULTS ARE:");
+ int z9 = 1;
+ for (int i = 7; i >= 0; i--) {
+ int f = m[i];
+ System.out.println();
+ System.out.println(z9 + " PLACE HORSE NO. " + f + " AT " + (r / d[f - 1]) + ":1");
+ z9++;
+ }
+ bets.forEach((betName, bet) -> {
+ if (bet.horseNumber == m[7]) {
+ int n = bet.horseNumber;
+ System.out.println();
+ System.out.printf("%s WINS $ %.2f %n", bet.betName, ((float) r / d[n]) * bet.amount);
+ }
+ });
+ }
+
+ private static Map takeBets(Scanner scanner, List betNames) {
+ Map bets = new HashMap<>();
+ System.out.println("--------------------------------------------------");
+ System.out.println("PLACE YOUR BETS...HORSE # THEN AMOUNT");
+ for (String betName : betNames) {
+ boolean validInput = false;
+ while (!validInput) {
+ int horseNumber = readInt(betName, scanner);//Q in the original
+ double betAmount = readDouble("?", scanner); //P in the original
+ if (betAmount < 1 || betAmount > 100000) {
+ System.out.println(" YOU CAN'T DO THAT!");
+ } else {
+ bets.put(betName, new Bet(betName, horseNumber, betAmount));
+ validInput = true;
+ }
+ }
+ }
+
+ return bets;
+ }
+
+ private static void printHelp(Scanner scanner) {
+ System.out.print("DO YOU WANT DIRECTIONS");
+
+ String directions = readChoice(scanner);
+
+ if (!directions.equalsIgnoreCase("NO")) {
+ System.out.println("UP TO 10 MAY PLAY. A TABLE OF ODDS WILL BE PRINTED. YOU");
+ System.out.println("MAY BET ANY + AMOUNT UNDER 100000 ON ONE HORSE.");
+ System.out.println("DURING THE RACE, A HORSE WILL BE SHOWN BY ITS");
+ System.out.println("NUMBER. THE HORSES RACE DOWN THE PAPER!");
+ System.out.println();
+ }
+ }
+
+ private static String readChoice(Scanner scanner) {
+ System.out.print("? ");
+ return scanner.nextLine();
+ }
+
+ private static int readInt(String prompt, Scanner scanner) {
+ System.out.print(prompt);
+ while (true) {
+ System.out.print("? ");
+ String input = scanner.nextLine();
+ try {
+ return Integer.parseInt(input);
+ } catch (NumberFormatException e) {
+ System.out.println("!NUMBER EXPECTED - RETRY INPUT LINE");
+ }
+ }
+ }
+
+ private static double readDouble(String prompt, Scanner scanner) {
+ System.out.print(prompt);
+ while (true) {
+ System.out.print("? ");
+ String input = scanner.nextLine();
+ try {
+ return Double.parseDouble(input);
+ } catch (NumberFormatException e) {
+ System.out.println("!NUMBER EXPECTED - RETRY INPUT LINE");
+ }
+ }
+ }
+
+ private static List readBetNames(Scanner scanner) {
+ int c = readInt("HOW MANY WANT TO BET ", scanner);
+ System.out.println("WHEN ? APPEARS,TYPE NAME");
+ List names = new ArrayList<>();
+ for (int i = 1; i <= c; i++) {
+ System.out.print("? ");
+ names.add(scanner.nextLine());
+ }
+
+ return names;
+ }
+
+ private static void printHeader() {
+ System.out.println(" HORSERACE");
+ System.out.println(" CREATIVE COMPUTING MORRISTOWN, NEW JERSEY\n");
+ System.out.println("\n\n");
+ System.out.println("WELCOME TO SOUTH PORTLAND HIGH RACETRACK");
+ System.out.println(" ...OWNED BY LAURIE CHEVALIER");
+ }
+
+ private static class Bet {
+ String betName;
+ int horseNumber;
+ double amount;
+
+ public Bet(String betName, int horseNumber, double amount) {
+ this.betName = betName;
+ this.horseNumber = horseNumber;
+ this.amount = amount;
+ }
+
+ @Override
+ public String toString() {
+ return "Bet{" +
+ "betName='" + betName + '\'' +
+ ", horseNumber=" + horseNumber +
+ ", amount=" + amount +
+ '}';
+ }
+ }
+}
+
diff --git a/README.md b/README.md
index 17b828ff0..1ba366b81 100644
--- a/README.md
+++ b/README.md
@@ -127,7 +127,7 @@ NOTE: per [the official blog post announcement](https://blog.codinghorror.com/up
| 47_Hi-Lo | x | | x | x | x | x | x | x | x | x |
| 48_High_IQ | x | x | x | | | | x | | | x |
| 49_Hockey | x | | x | | | | x | | | x |
-| 50_Horserace | x | | x | | | | | | x | x |
+| 50_Horserace | x | x | x | | | | | | x | x |
| 51_Hurkle | x | x | x | | | x | x | x | x | x |
| 52_Kinema | x | x | x | | | x | x | x | | x |
| 53_King | x | | x | | | | x | | x | x |