12.2. Metadata
The JDBC specification features a ResultSetMetaData object that can be used to get metadata regarding a result set.
The following code example from the API creates a result set and then creates a ResultSetMetaData object. It uses the MetaData object to determine how many columns are in the result set and whether the first column can be used in a WHERE clause.
ResultSet rs = stmt.executeQuery("SELECT a, b, c FROM TABLE2");
ResultSetMetaData rsmd = rs.getMetaData();
int numberOfColumns = rsmd.getColumnCount();
boolean b = rsmd.isSearchable(1);
To find out more about what methods are available to a ResultSetMetaData object, I encourage you to visit the java.sql package in the API and work with this class further.
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