如何使用参数化构造函数创建类的另一个实例

Question

1. 测试您的计划

创建一个名为Demo.java的类。该类将包含您的主要方法

使用默认构造函数创建类（对象）的实例。

调用所有对象setter（mutator）方法为对象赋值

调用对象显示方法，打印出它的值

使用参数化构造函数

创建类的另一个实例（另一个对象）

调用对象显示方法，打印出它的值

public class Shoes {


//Instance Variables
private String brand; 
private int cost; 
private double size; 


// Default Constructor
    public Shoes(){
        brand = "";
        cost = 0;
        size = 0;
    }

//Constructor
public Shoes (String brand, int cost, double size)
{
    this.brand = brand;
    this.cost = cost;
    this.size = size;
}



//Setter
public void setBrand (String brand)
{
    this.brand=brand;
}

public void setCost (int cost)
{
    this.cost=cost;
}

public void setSize (double size)
{
    this.size=size;
}


//Getter
public String getBrand()
{
    return brand;
}

public int getCost()
{
    return cost;
}

public double getSize()
{
    return size;
}

// Display data
public void display()
{
    System.out.println(brand);
    System.out.println(cost);
    System.out.println(size);

}   

}

public class Demo {

public static void main(String[] args) {

    // Create a object
            Shoes yeezys = new Shoes();
            Shoes kobes = new Shoes();

            yeezys.setBrand("Adidas");
            yeezys.setCost(200);
            yeezys.setSize(8.5);
            yeezys.display();

        System.out.println(""); 

    //Second object? Need help with this
            kobes.setBrand("Nike");
            kobes.setCost(150);
            kobes.setSize(9.5);
            kobes.display();

}

}