Java 如何制作菜单来选择不同的项目,然后在driver类中计算总计
我一直在尝试实现一个菜单,用户可以在其中输入他们是想要点菜还是三餐(饮料、沙拉和三明治)。我不知道如何使用扫描仪,它会调用不同的类Java 如何制作菜单来选择不同的项目,然后在driver类中计算总计,java,class,methods,java.util.scanner,subclass,Java,Class,Methods,Java.util.scanner,Subclass,我一直在尝试实现一个菜单,用户可以在其中输入他们是想要点菜还是三餐(饮料、沙拉和三明治)。我不知道如何使用扫描仪,它会调用不同的类 public class Trio implements MenuItem{ private String name; private double price; public Trio(Sandwich s,Salad sl,Drink d) { name=""+s.getName()+" /
public class Trio implements MenuItem{
private String name;
private double price;
public Trio(Sandwich s,Salad sl,Drink d) {
name=""+s.getName()+" / "+sl.getName()+" / "+d.getName()+" Trio";
price=0;
double a=s.getPrice(),b=sl.getPrice(),c=d.getPrice();
if(a<=b&&a<=c)
price=b+c;
else if(b<=a&&b<=c)
price=a+c;
else if(c<=b&&c<=a)
price=a+b;
}
public String getName() {
return name;
}
public double getPrice() {
return price;
}
}
我被困在如何与驱动程序调用不同的类上。我想让用户输入他们想要的数字
public class Driver {
public static void main(String[] args) {
//Create a sandwich object with the given data
Sandwich sandwich1=new Sandwich("Cheeseburger",2.75);
Sandwich sandwich2=new Sandwich("Club Sandwich",2.75);
//Create salad object with the given data
Salad salad1=new Salad("Spinach Salad",1.25);
Salad salad2=new Salad("Coleslaw",1.25);
//Create Drink object with given data
Drink drink1=new Drink("Orange Soda",1.25);
Drink drink2=new Drink("Cappuccino",3.50);
//Create a Trio
Trio t1=new Trio(sandwich1,salad1,drink1);
//Display its info
System.out.println(""+t1.getName()+" and the price is : $"+t1.getPrice());
Trio t2=new Trio(sandwich2,salad2,drink2);
System.out.println(""+t2.getName()+" and the price is : $"+t2.getPrice());
System.out.println("Welcome to Java Restaurant!");
System.out.println("Type 1 for Orange Soda:");
}
}
public class Driver {
public static void main(String[] args) {
//Create a sandwich object with the given data
Sandwich sandwich1=new Sandwich("Cheeseburger",2.75);
Sandwich sandwich2=new Sandwich("Club Sandwich",2.75);
//Create salad object with the given data
Salad salad1=new Salad("Spinach Salad",1.25);
Salad salad2=new Salad("Coleslaw",1.25);
//Create Drink object with given data
Drink drink1=new Drink("Orange Soda",1.25);
Drink drink2=new Drink("Cappuccino",3.50);
//Create a Trio
Trio t1=new Trio(sandwich1,salad1,drink1);
//Display its info
System.out.println(""+t1.getName()+" and the price is : $"+t1.getPrice());
Trio t2=new Trio(sandwich2,salad2,drink2);
System.out.println(""+t2.getName()+" and the price is : $"+t2.getPrice());
System.out.println("Welcome to Java Restaurant!");
System.out.println("Type 1 for Orange Soda:");
}
}
public class Drink implements MenuItem {
private String name;
private double price;
public Drink(String name, double price) {
this.name = name;
this.price = price;
}
public void setName(String name) {
this.name = name;
}
public void setPrice(double price) {
this.price = price;
}
public String getName() {
return name;
}
public double getPrice() {
return price;
}
}
public class Salad implements MenuItem {
private String name;
private double price;
public Salad(String name, double price) {
this.name = name;
this.price = price;
}
public void setName(String name) {
this.name = name;
}
public void setPrice(double price) {
this.price = price;
}
@Override
public String getName() {
return name;
}
@Override
public double getPrice() {
return price;
}
}
public class Sandwich implements MenuItem {
//declare and privatize sandwich name and price
private String name;
private double price;
//override sandwich class
public Sandwich(String name, double price) {
this.name = name;
this.price = price;
}
public void setName(String name) {
this.name = name;
}
public void setPrice(double price) {
this.price = price;
}
@Override
public String getName() {
return name;
}
@Override
public double getPrice() {
return price;
}
}