GenerateResultSet

What does the following code mean?

public void generateResultSet()
{
try
{

String query="Insert into Gebruikers (email, paswoord, voornaam, familienaam) Values ('email@hotmail.com','paswoord','Voornaam','Famili enaam')";

performQuery(query);

databaseStmt = databaseConnection.createStatement();
System.out.println("In generate resultset voor query");
databaseRS = databaseStmt.executeQuery("Select * from Gebruikers;");
System.out.println("In generate resultset na query");
printResultSet(databaseRS);
} // END TRY
catch(SQLException error)
{
System.out.println( "Error connecting to database: \n" + error.toString());

} // END CATCH
}




And what does this mean???


class PrintColumnTypes {

public static void printColTypes(ResultSetMetaData rsmd)
throws SQLException {
int columns = rsmd.getColumnCount();
for (int i = 1; i <= columns; i++) {
int jdbcType = rsmd.getColumnType(i);
String name = rsmd.getColumnTypeName(i);
System.out.print("Column " + i + " is JDBC type " + jdbcType);
System.out.println(", which the DBMS calls " + name);
}
} // UITSCHRIJVEN MET WELKE SOORT WE BEZIG ZIJN, STRING, INT, ...
}

What do you think it means?
The first one is fairly self-explanatory (if a little pointless).
As is the second one come to that.

Can you just explain what the first one means, we think that the second one prints the types of the data.

Can you confirm this?

Do you know about JDBC and SQL in general?
If not then this will be meaningless anyway.