定义手机类，手机有品牌(brand),价格(price)和颜色(color)三个属性，有打电话call()和sendmessage()两个功能。\n\n 请定义出手机类，类中要有空参、有参构造方

法，以及属性的get和set方法，同时实现打电话和发送短信的方法。代码如下：

public class Phone {
    private String brand;
    private double price;
    private String color;

    public Phone() {
    }

    public Phone(String brand, double price, String color) {
        this.brand = brand;
        this.price = price;
        this.color = color;
    }

    public String getBrand() {
        return brand;
    }

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

    public double getPrice() {
        return price;
    }

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

    public String getColor() {
        return color;
    }

    public void setColor(String color) {
        this.color = color;
    }

    public void call() {
        System.out.println("打电话");
    }

    public void sendMessage() {
        System.out.println("发送短信");
    }
}