Дайте подсказку плиз)

package com.javarush.task.pro.task10.task1010; import java.util.Objects; /* Два айфона */ public class Iphone { private String model; private String color; private int price; public Iphone(String model, String color, int price) { this.model = model; this.color = color; this.price = price; } @Override public boolean equals(Object o) { if (this == o) return true; if (o==null) return false; if (!(o instanceof Iphone)) return false; Iphone iphone = (Iphone) o; if (iphone.price!=this.price) return false; if( this.model==null) return iphone.model==null; if( this.color==null) return iphone.color==null; return this.color.equals(iphone.color) && this.model.equals(iphone.model); } public static void main(String[] args) { Iphone iphone1 = new Iphone("X", "Black", 999); Iphone iphone2 = new Iphone("X", "Black", 999); System.out.println(iphone1.equals(iphone2)); } }