用Java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。

以下是用Java创建的车辆类的代码，其中包括两个构造方法和两个方法成员：

public class Vehicle {
    private int weight;
    private String type;
    
    public Vehicle() {
        this.type = "unknown";
        this.weight = 0;
    }
    
    public Vehicle(String type, int weight) {
        this.type = type;
        this.weight = weight;
    }
    
    public void Run() {
        System.out.println("The vehicle is running.");
    }
    
    public void ShowVehicleInfo() {
        System.out.println("Vehicle type: " + this.type);
        System.out.println("Vehicle weight: " + this.weight);
    }
    
    public static void main(String[] args) {
        Vehicle vehicle1 = new Vehicle();
        Vehicle vehicle2 = new Vehicle("SUV", 2000);
        vehicle1.Run();
        vehicle1.ShowVehicleInfo();
        vehicle2.Run();
        vehicle2.ShowVehicleInfo();
    }
}

输出结果如下：

The vehicle is running.
Vehicle type: unknown
Vehicle weight: 0
The vehicle is running.
Vehicle type: SUV
Vehicle weight: 2000