NoSuchField Exception in reflection

i wrote a code to get value of a attribute of a object using reflection but it gives nosuchfield exception.The class which contain id field is

public class PartialSettBank {

// empty constructor
public PartialSettBank() {
}


protected Integer id;

protected String bankCode;

protected String bankName;

protected String description;

protected Integer isDeleted = 0;

protected Integer isPosted = 1;

protected Integer active;

protected LocalDateTime created;

protected String createdBy;

protected LocalDateTime updated;

protected String updatedBy;

------getter setter()
}

I want to access id field using reflection

Field id = object.getClass().getDeclaredField("id");
id.setAccessible(true); 

this object is from class 'PartialSettBank'.object contains id field.I checked it.why it is giving such error i have no idea.