As a Seller, how can I hold a payment until customer information is verified?

Hello, I am going to be taking payments from students for software online. I only want to sell to students and need to verify their information before processing their payment. My current order process has me taking payment and the information at the same time. Is there a way in PayPal I can hold the payment processing until I verify the information? If the information is verified i would process the payment, if not I would cancel. Thanks for any help. Chris

Try
Removing and reinstalling iTunes and other software components for Windows Vista, Windows 7, or Windows 8
However, after your remove the Apple software components also remove the iCloud Control Panel via Windows Programs and Featurs appin the Window Control Panel. Then reinstall all the Apple software components

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How can I hold values in a variable

I am looking for someone to point me in the right direction - I'm somewhat new to Java, but am a dinosaur from the mainframe, and sometimes get frustrated at the amount of effort I need to go through to do something that would have been simple on the mainframe...
I have a Swing based GUI application that I am trying to write - it uses Swing components to build a GUI interface and present data to the user. This data comes from a flat file that is XML based. The structure is as follows:
"Main" class (establishes the GUI, etc.)
|
Specific class (establishes a specific page in the GUI; there are many of these)
|
XML Reader class - uses parsing functions to read the file; stores data into an array
The problem is that I make an initial call to the method that parses the XML file and builds the data in the array. I can see this through my debugging tool; it is confirmed in tracing messages I have built into the program.
I then return to the specific class, and it wants to do specific things to build the GUI pages, based on customer input. So for example, I may want to go and get information on the third record in the XML file - I pass back an index value, and it should return information. Unfortunately, the array is now empty when I return to extract the values.
How can I hold the values in the array so that I can return and extract (and ultimately update) the values when I need them. There are initially about 25 different arrays - some Integer, Some Strings, and some String buffers. I have seen an indication that I could implmenet Serializable to do this, but it seems that this is a lot of I/O - parsing the data, then serializing it back to disk, and then reading it back every time I want to access it. I have thought about doing it through a data base, but I don't have a DBMS available currently, and this is possibly beyond my level at the moment.
I appreciate any suggestions that you might have.
Jerry

The xml file that I have is something that I
established my self. It follows the standard xml
conventions, just straight <tag field="xyz" /> stuff.
About as fancy as it gets is to have free form text
t lines where I need to capture the information in a
String buffer out of the parser. The format of the
tag is like this:
<comments>
multiple lines of text
follow...
</comments>In that case, depending on your utilization of the data(if this is not intended to carry data around different systems) you can just serialize it to the file and after retrieve it using XMLEncoder and XMLDecoder from java.bean package.(Have a look on the javadocs for J2SE)
If your XML is intended to be passed around different systems, you can use JAXB to bind the document to a object model, instead of parsing it yourself.
I sem to be having issues with passing control
between classes - As I understand it, values that you
establish in one class must be passed along to the
caller - there doesn't seem to be a conceopt like a
"data section" where data can be stored for access by
all classes that need access to it. Gosling fobid it!!!!!
Or is there, and
I just haven't discovered it yet.No you won't, happily there is no such a thing, once you got the hang of OO principles and design, you will see that this is not only dangerous as it adds too much complexity to the system for those mantainig the code.
If you want data to be acessed througout the system, uniquely, there are means to do that, like Singleton pattern(GoF, 127) and Common Object Registry pattern(Software Architeture Design Patterns in Java, 423)
But I think this is not the solution to tyour problem, as far as I understand, you get data from your XML file, that seems to have a structure repeating over the file, and you want to display it to your user.
The firsting I would advise is to not use arrays as carriers for your data. Instead use objects that represent your data stored in collections, for example, if you have a xml file like this:
<people>
   <person>
         <name>Jeff</name>
         <age>6</age>
   </person>
   <person>
         <name>Rage</name>
         <age>36</age>
   </person>
   <person>
         <name>Rene</name>
         <age>666</age>
   </person>
</people>Then, have a class that hold the data for person:
* @(#)Person.java     v1.0     02/03/2005
import java.io.Serializable;
* Class that stands for a person data.
* @author Notivago     02/03/2005
* @version 1.0
public class Person implements Serializable {
     * The class implements java.io.Serializable, as it is
     * required for the class to be a java bean.
     * The proper way to have classes offering its data
     * to the external world is by having get/set methods
     * that handle acess to internal fields.
     * Never make the class fields public.
     * The age of the person this class represents
    private int age;
     * The name of the person this class stands for.
    private String name;
     * Vanilla constructor for the class, as required for classes to be
     * java beans. Initializes the class with age 0 and a empty name.
    public Person() {
        super();
        age = 0;
        name = "";
     * Convenience constructor that allows your bean to be created
     * with age and name set.
     * @param age
     * @param name
    public Person(int age, String name) {
        this.age = age;
        this.name = name;
     * Acessor for the age of the person.
     * @return
     *           The age.
    int getAge() {
        return age;
     * Mutator for the age of the person.
     * @param age
     *           The age to set.
    void setAge(int age) {
        this.age = age;
     * Acessor for the name of the person.
     * @return
     *           The name of the person.
    String getName() {
        return name;
     * Mutator for the name of the person.
     * @param name
     *           The name of the person.
    void setName(String name) {
        this.name = name;
}Get the data from the XML document, with JAXB for example, and for each person found, create and populate a bean with the data, store the bean in the colection and pass it to the user interface to be displayed. (Look at the java.util documentation)
If you are into doing GUI, you will want to have a look in the MVC pattern, Model 2 pattern and the Swing "Separable Model" Architeture, so you learn how to make reusable decoupled GUIs. (search for MVC and Model 2 and look at the "How to use Swing Components" Documentation)
On using swing, you can get the collection of beans and bind it to lists, tables or any other presentation form you would want. Look at the swing tutorial on how to use data model to boost your GUI.(Look at "how to use swing documentation")
http://java.sun.com/docs/books/tutorial/uiswing/components/index.html
But here goes 2 cents of opinion, start by the basic tutorials:
http://java.sun.com/docs/books/tutorial/
especially the ones on Object Orientation:
the way things are done in Mainframe if very different as they are done on a OO language, before learning the language, you will have to learn a new mindset, so after reading the basic tutorials, it would be good you search for some good books that focus on OO thinking, a good one that does that and teaches java at the same time is:
Head First Java
It is a good and funny reading.
Head First Design Patterns
Also have a lot of good insights on OO and it comes with some patterns as a bonus.
I understand you see this all as overcomplicated, bu once you get the hang of it, you will see that there this only another way to see things and the stability and reusability attained is worth of the effort.
May the code be with you.

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As a Seller, how can I hold a payment until customer information is verified?

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