Java Database Connectivity (JDBC)

Hi I am creating a simple table like this (and dropping/creating schema before hand so my tests work correctly):

drop schema books cascade;
create schema books;
create sequence books.entity_id_sequence;
create table books.book(id bigint DEFAULT nextval('books.entity_id_sequence') primary key,
title varchar(256));

However when I use "executeUpdate" in my code like this -

int m = executeUpdate("INSERT INTO books.book VALUES(0,'Some books title')");

I don't know how to specify the next available id value I have just stuck a zero in there. How do you find the next available id value from the database?