What elements and methods should be implemented or defined in the Entity class?

In the Entity class in Java, the following elements and methods are usually implemented:

• Fields (attributes) — data describing the entity (e.g., id, name, etc.).
• Constructors — for initializing class objects.
• Getters and setters — methods for accessing and modifying fields.
• toString() method — for convenient representation of the object as a string.
• equals() and hashCode() methods — for correct comparison of objects and usage in collections.

Example:

public class Entity {
    private int id;
    private String name;

    public Entity(int id, String name) {
        this.id = id;
        this.name = name;
    }

    public int getId() {
        return id;
    }

    public void setId(int id) {
        this.id = id;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    @Override
    public String toString() {
        return "Entity{id=" + id + ", name='" + name + "'}";
    }

    @Override
    public boolean equals(Object o) {
        if (this == o) return true;
        if (o == null || getClass() != o.getClass()) return false;
        Entity entity = (Entity) o;
        return id == entity.id && (name != null ? name.equals(entity.name) : entity.name == null);
    }

    @Override
    public int hashCode() {
        int result = Integer.hashCode(id);
        result = 31 * result + (name != null ? name.hashCode() : 0);
        return result;
    }
}