Question

由于静态方法和变量，我的代码中存在很多问题。我是编程的新手，我注意到当我在课堂上使用静态时，我可以在任何我想要的地方调用它。下面的链接是我之前的问题（如果你需要，它只是为什么尝试不使用静态）有人告诉我删除静态的方法解决了我的问题。

PS：英语是我的第三语言，所以可能不好。但请帮助我，我被困了

Get random object from arraylist specific variable

所以我的问题：

我有一个构造函数来创建汽车，参数填充了函数。但是，由于尚未创建的对象，我无法获得这些方法。有没有办法我打电话给他们？这是我的代码：
现在Cars.getPosition()用红色加下划线，它告诉我让它静止。

从创建汽车的车库类：

public void addCar() {
    Cars car = new Cars(Cars.getID(), Cars.askCarID(), Cars.getPosition(), Attendant.askForAtt(), System.currentTimeMillis());
    myGarage.add(car);
    if(!(car.getAssignedTo()).equals(null)){
        car.getAssignedTo().setAssign(car);
        car.getAssignedTo().setAvailable(false);
    }
}

从汽车类：

private static void createCarsID() {

    for (int x = 0; x < Garage.getCarsCapacity(); x++) {
        String tempCarID = ("CR" + (x + 1));
        tempArray2.add(tempCarID);
    }
}

public static String getID() {

    createCarsID();
    String tempID = null;
    String tempPos = null;
    for (int x = 0; x < Garage.getCarsCapacity(); x++) {
        if (tempArray2.get(x) != null) {
            tempID = tempArray2.get(x);
            tempPos = tempArray2.get(x);
            tempArray2.remove(tempArray2.get(x));
            getPos(tempPos);
            //tempArray2.get(x) = null;
            break;
        }
    }
    return tempID;
}

public void getPos(String IdToPos) {
    String strPos = IdToPos.substring(2);
    int pos = Integer.parseInt(strPos);
    position = "GR" + pos;

}

Answer 1

这只是你可以做到的方法之一。新车的信息来自键盘，但不一定要这样。

Garage.java

package yourPackage;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.ArrayList;
import java.util.Scanner;
import java.util.logging.Level;
import java.util.logging.Logger;

/**
 *
 * @author Víctor Bernabé Pérez
 */
public class Garage {

    private final Scanner scanInt = new Scanner(System.in);
    private final InputStreamReader inStream = new InputStreamReader(System.in);
    private final BufferedReader scanText = new BufferedReader(inStream);
    private final ArrayList<Car> cars;

    public Garage() {
        cars = new ArrayList<>();
    }

    public void addCar() {
        try {
            System.out.print("id");
            int id = scanInt.nextInt();
            System.out.print("carId");
            int carId = scanInt.nextInt();
            System.out.print("position");
            int position = scanInt.nextInt();
            long timeMillis = System.currentTimeMillis();
            System.out.print("Attendant");
            String attendant = new String();
            try {
                attendant = scanText.readLine();
            } catch (IOException ex) {
                Logger.getLogger(Garage.class.getName()).log(Level.SEVERE, null, ex);
            }
            boolean free;
            String available = scanText.readLine();
            if (available.equals("s")) {
                free = true;
            } else {
                free = false;
            }

            cars.add(new Car(id, carId, position, attendant, timeMillis, free));
        } catch (IOException ex) {
            Logger.getLogger(Garage.class.getName()).log(Level.SEVERE, null, ex);
        }
    }
}

Car.java

package yourPackage;

/**
 *
 * @author Víctor Bernabe Pérez
 */
public class Car {

    private int id, carId, position;
    private long timeMillis;
    private String attendant;
    private boolean available;

    public Car(){
        //Nothing, just default constructor
    }

    public Car(int id, int carId, int position, String attendant, long timeMillis, boolean available){
        this.id = id;
        this.carId = carId;
        this.position = position;
        this.attendant = attendant;
        this.timeMillis = timeMillis;
        this.available = available;
    } 
}

从另一个类访问方法没有静态？

1 个答案: