public static Item random(final RandomGenerator random) {
			return new Item(random.nextDouble()*100, random.nextDouble()*100);
		}
Create a new <i>random</i> knapsack item for testing purpose.

@param random the random engine used for creating the knapsack item
@return a new <i>random</i> knapsack item
@throws NullPointerException if the random engine is {@code null}
jenetics.example/src/main/java/io/jenetics/example/Knapsack.java