SQL query executed by ResultSet in Java is returning different values than when executed in database

That's the query i'm running in database:

    SELECT CD_MAT, SUM(QT_MAT_UTIL) AS QT_MAT_UTIL FROM T476 
    WHERE (CD_UN_EXEC_SERV= 'X10' OR CD_UN_EXEC_SERV IN (SELECT 
    A.CD_UN_ORGANIZ FROM T016 A WHERE A.CD_UN_ORGANIZ_HIE ='X10'))
    AND MM_RA_EXEC = 6 AND AA_RA_EXEC = 2016
    AND CD_MAT = 15210001010
    GROUP BY CD_MAT
    ORDER BY 1 ASC, 2 DESC;

And that's the result I get when I run it in IBM Acess:

And that result is correct.

But when I run that same query in java using ResultSet, that's the result I get:

I have no idea why this is happening. Does anyone knows what am i doing wrong?

That's my java code(i'm absolutely sure that the variables are right):

  public ArrayList<Map<String, Object>> myProblematicMethod(String cod, Integer first, Integer last) throws Excecao {

ArrayList<Map<String, Object>> lista;
lista = new ArrayList<>();

try {

  StringBuffer sql = new StringBuffer();
  sql.append("SELECT CD_MAT , SUM(QT_MAT_UTIL) AS QT_MAT_UTIL FROM T476 ");
  sql.append(" WHERE (CD_UN_EXEC_SERV = ? OR CD_UN_EXEC_SERV ");
  sql.append(" IN (SELECT A.CD_UN_ORGANIZ FROM T016 A ");
  sql.append(" WHERE A.CD_UN_ORGANIZ_HIE = ?)) ");
  sql.append(" AND MM_RA_EXEC= ? AND AA_RA_EXEC= ? ");
  sql.append(" AND CD_MAT = 15210001010 ");
  sql.append(" GROUP BY CD_MAT ORDER BY 1 ASC, 2 DESC ");

  PreparedStatement ps = this.banco.criarPS(sql.toString());

  ps.setString(1, cod);
  ps.setString(2, cod);
  ps.setInt(3, first);
  ps.setInt(4, last);

  ResultSet resultSet = this.banco.consultarSQL(ps);

  while (resultSet.next()) {
    LinkedHashMap<String, Object> materiais = new LinkedHashMap<>();

    // campos presentes em todas as consultas realizadas
    materiais.put("cod", resultSet.getString("CD_MAT"));
    materiais.put("qnt", resultSet.getBigDecimal("QT_MAT_UTIL"));

    lista.add(materiais);
  }

      } catch (SQLException e) {
        e.printStackTrace();
        throw new Excecao(e.getErrorCode(), e.getSQLState() + " - " + e.getMessage());
      }

  return lista;
  }

Java does not return any exception to me and there's no other column with that value it is returning. I'm using java 1.8.0_65.