将用户输入值从 class 传递到 Java 上的 class

Question

我正在研究从 Java 书开始的停车票模拟器，所以我的想法是要求用户输入警官的姓名、警官的徽章编号和其他一些信息，我在 class ParkingCarSimulator class ParkingCarSimulator ZA6142F2ED4F8DC402 ParkingCarSimulator.java ，

所有这些工作正常，现在在 class 中称为PoliceOfficer ，位于PoliceOfficer.java文件中，我想知道我是否可以将用户输入从PoliceOfficer ParkingCarSimulator 。

任何想法将不胜感激，这是我的代码：

import java.util.Scanner;
public class ParkingCarSimulator {
    
    public static void main(String[] arsg)
    {
        
        String officerName, Make, carModel, carColor, carLicense;
        int badgeNumber, minOnCar, minPurchased;
        
        Scanner keyboard = new Scanner(System.in);
        
        System.out.println("Enter the officer's name");
        officerName = keyboard.nextLine();
        
        System.out.println("Enter the officer's badge number");
        badgeNumber = keyboard.nextInt();
        
        System.out.println("Enter the car's make");
        Make = keyboard.nextLine();
        
        System.out.println("Enter the car's model");
        carModel = keyboard.nextLine();
        
        System.out.println("Enter the car's color");
        carColor = keyboard.nextLine();
        
        System.out.println("Enter the car's liscence number");
        carLicense = keyboard.nextLine();
        
        System.out.println("Enter minutes on car");
        minOnCar = keyboard.nextInt();
        
        System.out.println("Enter the number of minutes purchased");
        minPurchased = keyboard.nextInt();
        
    }

}

这是警官。java

public class PoliceOfficer
{
    String policeName = ParkingCarSimulator.officerName;(this throws an error)
}

Answer 1

要创建PoliceOfficer ，您需要给它一个constructor ，然后在主代码中实例化它

public class PoliceOfficer{
    String policeName;
    int badgeNumber;

    public PoliceOfficer(String policeName, int badgeNumber){
        this.policeName = policeName;
        this.badgeNumber = badgeNumber;
    }
}

利用

public static void main(String[] args){
    Scanner keyboard = new Scanner(System.in);
    
    System.out.println("Enter the officer's name");
    String  officerName = keyboard.nextLine();
    
    System.out.println("Enter the officer's badge number");
    int  badgeNumber = keyboard.nextInt();
    
    PoliceOfficer po = new PoliceOfficer(officerName, badgeNumber);
}