New convenience functions from Dave. What are the chances?

git-svn-id: https://samskivert.googlecode.com/svn/trunk@2456 6335cc39-0255-0410-8fd6-9bcaacd3b74c

src/java/com/samskivert/util/RandomUtil.java

@@ -57,7 +57,7 @@ public class RandomUtil
      */
     public static int getInt (int high, Random r)
     {
-	return r.nextInt(high);
+        return r.nextInt(high);
     }
 
     /**
@@ -95,6 +95,24 @@ public class RandomUtil
         return r.nextFloat() * high;
     }
 
+    /**
+     * Returns true approximately one in n times.
+     */
+    public static boolean getChance (int n)
+    {
+        return getChance(n, rand);
+    }
+
+    /**
+     * Returns true approximately one in n times.
+     *
+     * @param r the random number generator to use
+     */
+    public static boolean getChance (int n, Random r)
+    {
+        return getInt(n, r) == 0;
+    }
+
     /**
      * Pick a random index from the array, weighted by the value of the corresponding array
      * element.