创建车辆程序

Question

这是我到目前为止的代码：

public class Vehicle {
    int speed;

    //Constructor
    public Vehicle () {
        this.speed = 0;
    }

    public void increaseSpeed (int differenceInc) {
        this.speed += differenceInc;
    }

    public void decreaseSpeed (int differenceDec) {
        this.speed -= differenceDec;
    }

    public void brake() {

    }

    public int getSpeed () {
        return this.speed;
    }   
}

这是我空的测试课。

public class VehicleTest {

public static void main(String[] args) {

    Vehicle golf = new Vehicle();

    //Speed which should be accelerated to:
    Vehicle myHybrid = new Vehicle();

    System.out.println("You've hit the given speed. Do you want to stay at this speed, break, or decrease to another given speed?");

}

}

Answer 1

public void increaseSpeed (int amount) {
    if (speed + amount < MAX_SPEED) {  // Where MAX_SPEED is a static final int of value 90
        this.speed += amount;
    } else {
        System.out.println("Max speed reached. Want to exceed (y/n)?");
        Scanner scanner = new Scanner(System.in);
        char c = scanner.next().charAt(0);
        if (c == 'y') {
            this.speed += amount;
        }
    }
}