Question

我需要一些帮助来使这个票务机器代码工作。我可以使用if，else if和else，并且我已经看到它使用while循环完成。但是，无论何时我尝试将其作为对象运行，我都会得到错误，因为代码底部的打印票证，或者构建成功而没有票证。这是我的代码

package ticketmachine;

import javax.swing.JOptionPane;


public class TicketMachine {
    private int price;
    private int change;
    private int balance;

public int getPrice(){
    return price;
}

public int getBalance(){
    return balance;
}

public TicketMachine (int ticketCost) {
    price = ticketCost;
    change = 0;
    balance = 0;
}

public void insertMoney (int amount){
    balance = balance + amount;
}    

public static void main(String[] args){ 

    String input1= JOptionPane.showInputDialog(null, " Insert a coin ");
    int ticketCost=Integer.parseInt(input1);


public void printTicket(){

    //Simulate the printing of a ticket
    System.out.println("##################");
    System.out.println("# Ticket");
    System.out.println("# " + price + " pence.");
    System.out.println("##################");
    System.out.println();
}
}        
}

Answer 1

现在打印出来

import javax.swing.JOptionPane;
import java.sql.PreparedStatement;


public class TicketMachine {
    private int price;
    private int change;
    private int balance;

    public int getPrice(){
        return price;
    }

    public int getBalance(){
        return balance;
    }

    public TicketMachine (int ticketCost) {
        price = ticketCost;
        change = 0;
        balance = 0;
    }

    public void insertMoney (int amount){
        balance = balance + amount;
    }

    public static void main(String[] args) {

        String input1 = JOptionPane.showInputDialog(null, " Insert a coin ");
        int ticketCost = Integer.parseInt(input1);
        TicketMachine ticketMachine = new TicketMachine(ticketCost);
        ticketMachine.printTicket();
    }


    public void printTicket(){

        //Simulate the printing of a ticket
        System.out.println("##################");
        System.out.println("# Ticket");
        System.out.println("# " + this.price + " pence.");
        System.out.println("##################");
        System.out.println();
    }
}

您应该尝试了解OOP的工作原理。人们说他们不了解你的需要，因为你甚至没有打电话给打印丛林的方法。

Answer 2

最后两种方法的结束括号错误。尝试：

    public static void main(String[] args){ 

        String input1= JOptionPane.showInputDialog(null, " Insert a coin ");
        int ticketCost=Integer.parseInt(input1);

    } //Here 
    public void printTicket(){

        //Simulate the printing of a ticket
        System.out.println("##################");
        System.out.println("# Ticket");
        System.out.println("# " + price + " pence.");
        System.out.println("##################");
        System.out.println();
    }

  } //Closing of the class.

netbeans中的售票机

2 个答案: