Add Util class with random implementation

src/com/annimon/turrets/Util.java

@@ -0,0 +1,50 @@
+package com.annimon.turrets;
+
+import java.util.Random;
+
+/**
+ *
+ * @author aNNiMON
+ */
+public class Util {
+    
+    private static final Random random = new Random();
+    
+    public static int rand(int to) {
+	return random.nextInt(to);
+    }
+    
+    public static int rand(int from, int to) {
+	return random.nextInt(to - from) + from;
+    }
+    
+    public static double rand(double from, double to) {
+	return random.nextDouble() * (to - from) + from;
+    }
+
+    public static int randomColor(int from, int to) {
+	if (from < 0) {
+	    from = 0;
+	} else if (from > 255) {
+	    from = 255;
+	}
+	if (to < 0) {
+	    to = 0;
+	} else if (to > 255) {
+	    to = 255;
+	}
+	if (from == to) {
+	    return (0xFF000000 | (from << 16) | (from << 8) | from);
+	} else if (from > to) {
+	    final int temp = to;
+	    to = from;
+	    from = temp;
+	}
+
+	final int red = rand(from, to);
+	final int green = rand(from, to);
+	final int blue = rand(from, to);
+
+	return (0xFF000000 | (red << 16) | (green << 8) | blue);
+    }
+}