How to get the number of columns in a ResultSet in Java

In Java it is possible to retrieve the number of columns of a ResultSet dinamically, thanks to the ResultSetMetaData class. Here’s an example: // Here you get the conn object. E.g.: // Connection conn = DriverManager.getConnection(...); Statement st = conn.createStatement(); ResultSet rs = st.executeQuery("SELECT * FROM your_table"); ResultSetMetaData rsmd = rs.getMetaData(); int numCols = rsmd.getColumnCount(); System.out.println("Number of columns in your_table: " + numCols); The previous code retrieves and displays the number of columns of your_table.