Como listar os dados Usando Hibernate?

package hibernate;



import java.util.List;

import javax.swing.JOptionPane;

import org.hibernate.Query;
import org.hibernate.Session;
import org.hibernate.Transaction;




public class Dao {

	
	public Dao(){
		
	}
	
	public <T> boolean inserirObjeto(T objeto) {

		Session sessao = HibernateUtility.getSession();
		Transaction transacao = sessao.beginTransaction();

		try {
			sessao.save(objeto);
			transacao.commit();
			return true;
		} catch (Exception e) {
			e.printStackTrace();
			JOptionPane.showMessageDialog(null,"Tem campos em Branco ! Porfavor Preencha corretamente");
			return false;
		} finally {
			sessao.close();
		}
		
	}

	public <T> boolean atualizarObjeto(T objeto) {

		Session sessao = HibernateUtility.getSession();
		Transaction transacao = sessao.beginTransaction();

		try {
			sessao.update(objeto);
			transacao.commit();
			return true;
		} catch (Exception e) {
			e.printStackTrace();
			System.out.println("erro");
			return false;
		} finally {
			sessao.close();
		}
		
	}

	public <T> boolean deletarObjeto(T objeto) {

		Session sessao = HibernateUtility.getSession();
		Transaction transacao = sessao.beginTransaction();

		try {
			sessao.delete(objeto);
			transacao.commit();
			return true;
		} catch (Exception e) {
			e.printStackTrace();
			System.out.println("erro");
			return false;
		} finally {
			sessao.close();
		}
		
	}

	public List<?> listarObjeto(String query) {
		
		Session sessao = HibernateUtility.getSession();
		Transaction tx = sessao.beginTransaction();
		
		try {
			Query select = sessao.createQuery(query);
			List<?> list = select.list();
			tx.commit();
			return list;
		} catch (Exception e) {
			e.printStackTrace();
			
			return null;
		} finally {
			sessao.close();
		}
		
	}
	
}