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我想看看如何获取客户对象的名称和食物,当它已被添加到队列?所以说,我想打印一个字符串,使用第一个客户对象的名称和食物元素添加到队列后?队列窥视方法是占位符,因为我不确定如何在将队列添加到队列中后访问对象的名称和食物。如果我打印peek方法,它只是给我的内存位置,而不是对象的食物或名称。对象添加到队列后访问对象变量?
结果会是这样的:
“你想要什么工艺做?!披萨或沙拉
沙拉
詹姆斯的沙拉做”
代码:
主要类:
import java.util.Scanner;
import java.io.File;
import java.io.FileNotFoundException;
import java.util.LinkedList;
import java.util.Queue;
public class Main {
public static void main(String[] args) throws FileNotFoundException {
File customerTxt = new File("customer.txt");
Queue<Customer> pizza = new LinkedList<Customer>();
Queue<Customer> salad = new LinkedList<Customer>();
try {
Scanner readCus = new Scanner(customerTxt);
Scanner readFood = new Scanner(System.in);
while (readCus.hasNextLine()) {
String line = readCus.nextLine();
String[] strArray = line.split(",");
String customerName = strArray[0];
String customerFood = strArray[1];
Customer cus = new Customer(customerName, customerFood);
if (customerFood.equalsIgnoreCase("salad")) {
salad.add(cus);
}
if (customerFood.equalsIgnoreCase("pizza")) {
pizza.add(cus);
}
}
if (pizza.isEmpty() == false && salad.isEmpty() == false) {
System.out.println("What kind of food would you like to make?");
String foodChoice = readFood.nextLine();
if (foodChoice.equalsIgnoreCase("salad")) {
System.out.println(salad.peek());
}
if (foodChoice.equalsIgnoreCase("pizza")) {
System.out.println(salad.peek());
}
}
if (pizza.isEmpty() == true && salad.isEmpty() == false) {
System.out.println("There are no Pizzas left to process. I will just finish the rest of the Salads");
while (salad.isEmpty() == false) {
System.out.println(salad.peek());
}
}
if (pizza.isEmpty() == false && salad.isEmpty() == true) {
System.out.println("There are no Salads left to process. I will just finish the rest of the Pizzas");
while (pizza.isEmpty() == false) {
System.out.println(pizza.peek());
}
}
}
catch (FileNotFoundException e) {
e.printStackTrace();
}
}
}
Customer类:
public class Customer {
public String name = "";
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String food = "";
public String getFood() {
return food;
}
public void setFood(String food) {
this.food = food;
}
public Customer(String customerName, String customerFood) {
this.name = customerName;
this.food = customerFood;
}
}
覆盖Customer类中的'toString()'以包含食物和名称值 –
在附注中,当!!<!布尔值> = false时很难找到< <布尔值>'会很好。也许这只是我,但我认为你应该把'pizza.isEmpty()== false && salad.isEmpty()== false'改成'! pizza.isEmpty()&&! salad.isEmpty()'或'!(pizza.isEmpty()|| salad.isEmpty())' – Aaron