i'm trying to display a list of customers with the orders that every customer did,

class customer {
    long id;
    String name;
    ArrayList<order> orders;
}

where order type is:

class order {
    long id;
    Date date;
    double value;
}

a list of customer is supposed to be displayed like in the following pic:
http://i40.tinypic.com/2cdtmrl.jpg