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我正在尝试通过从给定的扫描仪中读取项目来构建商店。构造函数必须重复（直到项目名称为 *）从给定的扫描仪对象中读取项目并将其添加到其清单中。

面包 2.75 25

我需要将这样的字符串分成“面包面包”“2.75”和“25”。然后转到下一行并做同样的事情，直到它显示“*”

public class Store {
private ArrayList<Item> inventory;

// CONSTRUCTORS

/*
 * Constructs a store without any items in its inventory.
 */
public Store() {

}

/*
 * Constructs a store by reading items from a given Scanner. The constructor
 * must repeatedly (until item name is *) read items from the given scanner
 * object and add it to its inventory. Here is an example of the data (that
 * has three items) that could be entered for reading from the supplied
 * scanner:
 */
public Store(Scanner keyboard) {
    while(keyboard != null){

    }
}
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1 回答 1

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试试下面的代码。它工作我最近检查过。

import java.util.ArrayList;
import java.util.List;
import java.util.Scanner;

public class MyClient {

    public static void main(String args[]) {

        List<Item> inventory = new ArrayList<Item>();

        Scanner sc = new Scanner(System.in);
        while (sc.hasNext()) {
            String s1 = sc.nextLine();

            if (s1.equals("*")) {
                break;
            } else {
                Scanner ls = new Scanner(s1);
                while (ls.hasNext()) {
                    Item item = new Item(ls.next(), ls.nextFloat(), ls.nextInt());
                    inventory.add(item);
                }

            }
        }
        System.out.println(inventory);

    }
}

现在你需要创建一个 Item.java 下面是 Item .java

public class Item {
    private String name;
    private int quanity;
    private float price;

    public Item(String name, float price, int quanity) {
        this.name = name;
        this.price = price;
        this.quanity = quanity;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public int getQuanity() {
        return quanity;
    }

    public void setQuanity(int quanity) {
        this.quanity = quanity;
    }

    public float getPrice() {
        return price;
    }

    public void setPrice(float price) {
        this.price = price;
    }

    @Override
    public String toString() {
        return "Item [name=" + name + ", quanity=" + quanity + ", price="
                + price + "]";
    }




}

在最后输入所有库存类型“*”（星号）后，它将列出所有输入的项目。

于 2013-02-05T04:43:32.497 回答