[英]How can I search through a scanner and divide a String by spaces?
I am trying to construct a store by reading items from a given Scanner. 我试图通过从给定的扫描仪中读取项目来构建商店。 The constructor must repeatedly (until item name is *) read items from the given scanner object and add it to its inventory.
构造函数必须重复(直到项目名称为*)从给定的扫描器对象读取项目并将其添加到其清单中。
BreadLoaf 2.75 25 面包2.75 25
I need to divide a string like this into "Breadloaf" "2.75", and "25". 我需要将这样的字符串分为“面包”,“ 2.75”和“ 25”。 And then go to the next line and do the same thing until it reads "*"
然后转到下一行并执行相同的操作,直到显示“ *”
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){
}
}
Try below code. 尝试下面的代码。 it works I have recently checked.
我最近检查过的作品。
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);
}
}
Now you need to create an Item.java below is Item .java 现在您需要创建一个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 + "]";
}
}
After typing all the inventory type "*"(star) at the end it will list all the entered Items . 在最后键入所有库存类型“ *”(星号)后,它将列出所有输入的物料。
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