创建一个车辆（Vehicle）类，数据成员有：weight（重量）、type（型号）,方法成员有：行驶Run()、显示车辆信息ShowVehicleInfo()，还需要编写两个构造方法，一个为无参数的构造方法；另一个为带两个参数的构造方法，两个参数分别用来初始化车辆对象的型号和重量。要求在主方法中分别用两个构造方法初始化车辆类的两个实例，并分别调用方法成员。使用java语句

来完成这个任务：

public class Vehicle {
    private double weight;
    private String type;

    public Vehicle() {}

    public Vehicle(double weight, String type) {
        this.weight = weight;
        this.type = type;
    }

    public void Run() {
        System.out.println("The vehicle is running.");
    }

    public void ShowVehicleInfo() {
        System.out.println("The vehicle is a " + type + " and its weight is " + weight + ".");
    }
}

public class Main {
    public static void main(String[] args) {
        Vehicle vehicle1 = new Vehicle();
        Vehicle vehicle2 = new Vehicle(5000, "SUV");

        vehicle1.Run();
        vehicle1.ShowVehicleInfo();

        vehicle2.Run();
        vehicle2.ShowVehicleInfo();
    }
}

输出结果如下：

The vehicle is running.
The vehicle is a null and its weight is 0.0.
The vehicle is running.
The vehicle is a SUV and its weight is 5000.0.