package com.sky.pgm;
import java.util.HashMap;
public class HashCodeImpl {
public static void main(String[] args) {
HashMap hm = new HashMap();
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;
}
}
}