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public static void makeSandwich()
{
System.out.println("Enter First Name: ");
String name = Scanner.next();
double price = sandwich.getBreadPrice() + sandwich.getMeatPrice() + sandwich.getVegPrice();
sandwich.setPrice(price);
NumberFormat currency = NumberFormat.getCurrencyInstance();
DateFormat dateFormat = new SimpleDateFormat("yyyy/MM/dd HH:mm:ss");
Date date = new Date();
System.out.println(dateFormat.format(date) + " " + name + " " + sandwich.getBread() + " " + sandwich.getMeat() + " " + sandwich.getVegetables() + " " + currency.format(sandwich.getPrice()));
OrderLine.writeOrderLine(name, sandwich.getBread(), sandwich.getMeat(), sandwich.getVegetables(), sandwich.getPrice());
}
和我的继承人为orderline.app代码写入文本文件问题
public class OrderLine{
private static Sandwich sandwich = null;
public static void writeOrderLine(String name, String bread, String meat, String veg, double price)
{
DateFormat dateFormat = new SimpleDateFormat("yyyy/MM/dd HH:mm:ss");
Date date = new Date();
try
{
File productsFile = new File("orderline.txt");
PrintWriter out = new PrintWriter(
new BufferedWriter(
new FileWriter(productsFile, true)));
out.print(dateFormat.format(date) + "\t");
out.print(name + "\t");
out.print(sandwich.getBread() + "\t");
out.print(sandwich.getMeat() + "\t");
out.print(sandwich.getVegetables() + "\t");
out.println(sandwich.getPrice() + "\t");
out.close();
}
catch (IOException e)
{
System.out.println(e);
}
}
}
它不会停止打印,但是当我加入这行“三明治=新的三明治()”前它的工作原理是orderline.java中的dateformat,但它最终会给我空串,因为我想我正在创建一个新的三明治。我怎么叫我已经做的三明治?
百胜餐饮,三明治。你应该在'makeSandwich()'方法中将'sandwich'实例作为参数传递给'writeOrderLine()',而不是三明治的各个组件。 – Vulcan
你能澄清吗?我以为我已经发送我的三明治实例作为参数OrderLine.writeOrderLine(name,sandwich.getBread(),sandwich.getMeat(),sandwich.getVegetables(),sandwich.getPrice()); –
再次,这些是三明治的各种组成部分,而不是“三明治”本身。唯一的参数应该是“夹心三明治”。 – Vulcan