Java 上机----实训操作6---汽车类

设计一个汽车类，属性有车轮个数与车重，卡车类是汽车类的子类，新增加的属性是载重量，面包车类是卡车类的子类，新增加的属性是载客数，要求每个类都有一个输出方法，用于输出相应的信息。

执行代码：

    public class qichelei      {
        protected int wheels;
        protected double weight;

    public qichelei(int wheels, double weight) {
            this.wheels = wheels;
            this.weight = weight;
        }

        public String toString() {
            return "qichelei[wheels=" + wheels + ", weight=" + weight + "]";
        }
    }

    class kachelei extends qichelei {
    protected int loader;

    public kachelei(int wheels, double weight, int loader) {
        super(wheels, weight);
        this.loader = loader;
    }

    public String toString() {
        return "kachelei[loader=" + loader + ", wheels=" + wheels + ", weight=" + weight +"]";
    }
}

    class mianbaochelei extends kachelei {
        private double payload;

        public mianbaochelei(int wheels, double weight, int loader, double payload) {
            super(wheels, weight, loader);
            this.payload = payload;
        }

        public String toString() {
            return "mianbaochelei[" +
                    "payload=" + payload +
                    ", loader=" + loader +
                    ", wheels=" + wheels +
                    ", weight=" + weight +
                    "]";
        }
    }

    class test {
    public static void main(String[] args) {
        mianbaochelei mianbaochelei = new mianbaochelei(4,400,7,400);
        System.out.println(mianbaochelei);
        kachelei kachelei = new kachelei(8,500,3);
        System.out.println(kachelei);
        qichelei qichelei = new qichelei(2,300);
        System.out.println(qichelei);
    }
}

执行结果：

·先调试后运行