java简单共享单车程序代码

以下是一个简单的Java共享单车程序的代码示例：

import java.util.ArrayList;
import java.util.List;

public class Bike {
    private String id; 
    private int location;
    private boolean isAvailable;

    // Constructor
    public Bike(String id, int location) {
        this.id = id;
        this.location = location;
        this.isAvailable = true;
    }

    // Getter and Setter methods
    public String getId() {
        return id;
    }

    public void setId(String id) {
        this.id = id;
    }

    public int getLocation() {
        return location;
    }

    public void setLocation(int location) {
        this.location = location;
    }

    public boolean isAvailable() {
        return isAvailable;
    }

    public void setAvailable(boolean available) {
        isAvailable = available;
    }
}

public class BikeSystem {
    private List<Bike> bikes;

    // Constructor
    public BikeSystem() {
        this.bikes = new ArrayList<>();
    }

    // Add a bike to the system
    public void addBike(Bike bike) {
        bikes.add(bike);
    }

    // Remove a bike from the system
    public void removeBike(Bike bike) {
        bikes.remove(bike);
    }

    // Update the location of a bike
    public void updateBikeLocation(Bike bike, int newLocation) {
        bike.setLocation(newLocation);
    }

    // Rent a bike
    public Bike rentBike(String id) {
        for (Bike bike : bikes) {
            if (bike.getId().equals(id) && bike.isAvailable()) {
                bike.setAvailable(false);
                return bike;
            }
        }
        return null;
    }

    // Return a bike
    public void returnBike(Bike bike) {
        bike.setAvailable(true);
    }
}

public class Main {
    public static void main(String[] args) {
        BikeSystem bikeSystem = new BikeSystem();

        // Add some bikes to the system
        bikeSystem.addBike(new Bike("001", 1));
        bikeSystem.addBike(new Bike("002", 2));
        bikeSystem.addBike(new Bike("003", 3));
        bikeSystem.addBike(new Bike("004", 4));
        bikeSystem.addBike(new Bike("005", 5));

        // Rent a bike
        Bike rentedBike = bikeSystem.rentBike("002");
        if (rentedBike != null) {
            System.out.println("Bike " + rentedBike.getId() + " is rented.");
        } else {
            System.out.println("Bike is not available.");
        }

        // Return the bike
        bikeSystem.returnBike(rentedBike);
        System.out.println("Bike " + rentedBike.getId() + " is returned.");
    }
}

在这个示例程序中，`Bike`类表示一辆共享单车，`BikeSystem`类表示共享单车管理系统。通过这两个类的方法，可以实现添加、删除、更新单车信息，租用单车和还车等功能。在`Main`类中，我们创建了一个`BikeSystem`对象，并添加了一些单车到系统中。我们还租用了一辆单车，然后还车，并打印出相应的信息。