moved implementations to individual folders

75_Roulette/java/oop/Wheel.java

@@ -0,0 +1,69 @@
+import java.util.Arrays;
+import java.util.HashSet;
+import java.util.Random;
+
+// The roulette wheel
+public class Wheel {
+    // List the numbers which are black
+    private HashSet<Integer> black = new HashSet<>(Arrays.asList(new Integer[] { 1,3,5,7,9,12,14,16,18,19,21,23,25,27,30,32,34,36 }));
+
+    private Random random = new Random();
+    private int pocket = 38;
+
+    public static final int ZERO=0;
+    public static final int BLACK=1;
+    public static final int RED=2;
+
+    // Set up a wheel. You call "spin", and then can check the result.
+    public Wheel() {
+    }
+
+    // Cheat / test mode
+    void setSeed(long l) {
+        random.setSeed(l);
+    }
+
+    // Spin the wheel onto a new random value.
+    public void spin() {
+        // keep spinning for a while
+        do {
+            try {
+                // 1 second delay. Where it stops, nobody knows
+                Thread.sleep(1000);
+            }
+            catch (InterruptedException e) {}
+
+            pocket = random.nextInt(38) + 1;
+        } while (random.nextInt(4) > 0); // keep spinning until it stops
+    }
+    
+    // The string representation of the number; 1-36, 0, or 00
+    public String value() {
+        if (pocket == 37) return "0";
+        else if (pocket == 38) return "00";
+        else return String.valueOf(pocket);
+    }
+
+    // True if either 0 or 00 is hit
+    public boolean zero() {
+        return (pocket > 36);
+    }
+
+    // True if anything other than 0 or 00 is hit
+    public boolean isNumber() {
+        return (pocket < 37);
+    }
+
+    // The number rolled
+    public int number() {
+        if (zero()) return 0;
+        else return pocket;
+    }
+
+    // Either ZERO, BLACK, or RED
+    public int color() {
+        if (zero()) return ZERO;
+        else if (black.contains(pocket)) return BLACK;
+        else return RED;
+    }
+}