@Override public void run() { Random random = new Random(); Broker buyer = TestTradeService.buyers[random.nextInt(TestTradeService.buyers.length)]; Stock stock = TestTradeService.stocks[random.nextInt(TestTradeService.stocks.length)]; int generatedPrice = random.nextInt(100); Bid bid = new Bid(); bid.setBuyer(buyer); bid.setStock(stock); bid.setPrice(generatedPrice); tradeService.setBid(bid); }