convert this code into a working class

import de.bezier.data.sql.*; PostgreSQL pgsql; float Value; Class Database_setup (float Value) { String user = "user"; String pass = "pass"; String database = "db"; float Value; void database_setup() { pgsql = new PostgreSQL( this, "[login to view URL]", database, user, pass ); if ([login to view URL]()) { database_query(); return (Value); } else { println ("program failed to connect to database"); } } void database_query () { [login to view URL] ("SELECT col FROM table ORDER BY col DESC LIMIT 1; "); float Value = [login to view URL] (); [login to view URL] (); println (Value); } The code should work from Processing 2 and retrieve the Value variable for manipulation.