// T.java
 
import java.sql.*;
 
public class T
{
	public static void main(String args[])
	{
		try
		{
			Class.forName("org.postgresql.Driver");
			String url = "jdbc:postgresql:Learn";
			String user = "postgres";
			String pass = "abc123";
			Connection conn = DriverManager.getConnection(url, user, pass);
			Statement stmt = conn.createStatement();
			ResultSet rs = stmt.executeQuery("Select * from contact_info");
			System.out.println(rs.toString());
			ResultSetMetaData rsmd = rs.getMetaData();
			int numColumns = rsmd.getColumnCount();
			for (int i=1; i<=numColumns; i++) 
			{
				System.out.println(
					rsmd.getColumnLabel(i) + " : " +
					rsmd.getColumnName(i) + " : " +
					rsmd.getColumnTypeName(i) + " : " +
					rsmd.getColumnDisplaySize(i) + " : " +
					rsmd.getPrecision(i) + " : " +
					rsmd.getScale(i)
					);
			}
		}
		catch (Exception e)
		{
			e.printStackTrace();
			System.err.println("Exception : "+e);
		}
	}
}

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