Apple 12$Apple[12]
Banana 0$Banana[0]
//3
//4
//5
//6 ここまでは設定
		InputStream fileStream = new FileInputStream("data.txt");
		System.setIn(fileStream);
		Scanner sc = new Scanner(System.in);
		Product pr1 = new Product();
		pr1.name = sc.next();
		pr1.stock = sc.nextInt();		
		System.out.println(pr1.name + "[" + pr1.stock + "]");
//class
//問題：クラス Product を宣言、 String型のname と int型のstockをフィールドに持つ