JComboBox + ArrayList + BD

package vini.util;

import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Vector;

import javax.swing.DefaultComboBoxModel;
import javax.swing.JComboBox;

public class JVComboBox extends JComboBox {

	/**
	 * 
	 */
	private static final long serialVersionUID = 1L;
	private List<Integer> Cods = new ArrayList<Integer>();
	private String Campo;
	
	public void setValue(int value) {
		for (int i = 0; i < Cods.size(); i++) {
			if (Cods.get(i) == value) {
				this.setSelectedIndex(i);
				return;
			}
		}				
		this.setSelectedIndex(-1);
	}

	public int getValue() {
		int iSel = this.getSelectedIndex();
		if (iSel >= 0 & iSel < Cods.size()) {
			return Cods.get(iSel);
		 } 
		
		return -1; 
	}
	
	public void addValue(int cod, String desc) {
		Cods.add(cod);
		this.addItem(desc);
	}
	

	public void preencheLista(Connection conexao, String Nometabela, String campocod, String Campodesc){
		Cods.clear();
		removeAllItems();

		String select = "select "+campocod+", "+Campodesc+" from " + Nometabela +" order by "+Campodesc;

		try {
			PreparedStatement pstm = conexao.prepareStatement(select);
			ResultSet rs = pstm.executeQuery();
			while(rs.next()){
				addValue(rs.getInt(1), rs.getString(2));
			}
			pstm.close();
			rs.close();
		} catch (SQLException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
	}


	public void setCampo(String campo) {
		Campo = campo;
	}

	public String getCampo() {
		return Campo;
	}
	

}