调用setPrice方法初始化price成员变量

Question

调用setPrice方法初始化price成员变量
调用setPrice方法初始化price成员变量
调用setPrice方法初始化price成员变量哪一步出错了

Answer 1

参考下面代码

public class A {

    public static void main(String[] args) {
        Price price = new Price(200, "zhangsan", 10);  //初始化
        System.out.println(price.toString());  //调用toString()方法
    }
}


class Price {
    private double price;
    private String name;
    private long id;
    
    static String static_name = "这是静态变量";
    
    //静态代码块
    static {
        System.out.println(static_name);
    }
    
    //构造方法
    public Price(double price, String name, long id) {
        this.price = price;
        this.name = name;
        this.id = id;
    }

    public double getPrice() {
        return price;
    }

    public void setPrice(double price) {
        this.price = price;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public long getId() {
        return id;
    }

    public void setId(long id) {
        this.id = id;
    }

    @Override
    public String toString() {
        return "Price [price=" + price + ", name=" + name + ", id=" + id + "]";
    }
    
    
}