package com.sky.pgm;

import java.util.HashMap;

public class HashCodeImpl {

public static void main(String[] args) {

HashMap<Price, String> hm = new HashMap<Price, String>();

hm.put(new Price("Banana", 20), "Banana");

hm.put(new Price("Apple", 40), "Apple");

hm.put(new Price("Orange", 30), "Orange");

//creating new object to use as key to get value

Price key = new Price("Banana", 20);

System.out.println("Hashcode of the key: "+key.hashCode());

System.out.println("Value from map: "+hm.get(key));

}

}

class Price{

private String item;

private int price;

public String getItem() {

return item;

}

public void setItem(String item) {

this.item = item;

}

public int getPrice() {

return price;

}

public void setPrice(int price) {

this.price = price;

}

public Price(String item, int price) {

super();

this.item = item;

this.price = price;

}

public String toString(){

return "item: "+item+" price: "+price;

}

public int hashCode(){

System.out.println("In hashcode");

int hashcode = 0;

hashcode = price*20;

hashcode += item.hashCode();

return hashcode;

}

public boolean equals(Object obj){

System.out.println("In equals");

if (obj instanceof Price) {

Price pp = (Price) obj;

return (pp.item.equals(this.item) && pp.price == this.price);

} else {

return false;

}

}

}