#{ Java: Colecciones, listas, mapas, etc. }

http://www.codercorp.com/blog/java/why-concurrenthashmap-is-better-than-hashtable-and-just-as-good-hashmap.html
http://javarevisited.blogspot.com/2010/10/difference-between-hashmap-and.html
http://stackoverflow.com/questions/40471/differences-between-hashmap-and-hashtable
http://stackoverflow.com/questions/1361784/hashmap-and-hashtable-in-multithreaded-environment
http://www.coderanch.com/t/374477/java/java/Books-java-collections-framework

#{ Java: Convertir un resultSet a ArrayList }

public ArrayList resultSetToArrayList(ResultSet rs) throws SQLException{
    ResultSetMetaData md = rs.getMetaData();
    int columns = md.getColumnCount();
    ArrayList results = new ArrayList();

    while (rs.next()) {
        HashMap row = new HashMap();
        results.add(row);

        for(int i=1; i<=columns; i++){
          row.put(md.getColumnName(i),rs.getObject(i));
        }
    }
    return results;
}

http://amcubes.com/2009/02/20/converting-resultset-into-arraylist/

#{ ArrayList vs. Vector → Performance }

http://skeletoncoder.blogspot.com/2006/09/java-tutorials-arraylist-or-vector.html