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public class Vehicle {
private double speed;
private int wheels;
public Vehicle() {
}
public Vehicle(double speed, int wheels) {
this.speed = speed;
this.wheels = wheels;
}
}
public class Motorcycle extends Vehicle {
private double engineSize;
public Motorcycle(double speed, double engine) {
super(speed, 2);
this.engineSize = engine;
}
}
public class Moped extends Motorcycle {
}
由于闷闷不乐延伸摩托车为什么会告诉我助力车需要做出一个构造函数?我希望脚踏车在没有任何构造函数的情况下工作。尝试从另一个子类继承时出错?
太感谢你了! –