byte getByte(int columnIndex) throws SQLException
Retrieves the value of the designated column in the current row of this ResultSet object as a byte in the Java programming language.
the first column is 1, the second is 2, ...
the column value; if the value is SQL NULL, the value returned is 0
SQLException - if a database access error occurs, columnIndex is less than 1 or greater than the number of columns, or this method is called on a closed result set
For more information, reference JDBC documentation for: ResultSet.getByte(int)