Card.java

package com.project.hospital.entity;

import lombok.AccessLevel;
import lombok.Data;
import lombok.experimental.FieldDefaults;

import javax.persistence.*;

@Data
@Entity
@Table(name = "card", schema = "hsptl")
@FieldDefaults(level=AccessLevel.PRIVATE)
public class Card {

    @Id
    @SequenceGenerator(name="card_id_seq", sequenceName="card_id_seq")
    @GeneratedValue(strategy=GenerationType.SEQUENCE, generator="card_id_seq")
    Integer id;

    @Override
    public int hashCode() {
        return 100000000 + this.id;
    }

    @Override
    public boolean equals(Object obj) {
        if(obj == null) {
            return false;
        }

        if(!(obj instanceof Card)) {
            return false;
        }

        return this.id.equals( ( (Card) obj).getId() );
    }
}