Listing 1:
<?xml version="1.0"?>
<PurchaseRequest>
  <BuyerName>TonyElectronics</BuyerName>
  <BuyerAddress>
    <StreetName>909 E. Las Marias</StreetName>
    <City>Dallas</City>
    <State>Texas</State>
    <ZipCode>75090</ZipCode>
  </BuyerAddress>
  <OrderNumber Quantity="500">
    <ProductID>PC102</ProductID>
    <ProductName>Siega 400MHz Pentium PC</ProductName>
    <DeliveryDate>November 19, 1999</DeliveryDate>
    <RequestedPrice>$1200</RequestedPrice>
  </OrderNumber>
</PurchaseRequest>

Listing 2:
Document doc;
TXElement root;
Buyer B;
Parser p = new Parser("XMLParser");
try {
    FileInputStream file = new FileInputStream(documentName);
    doc = p.readStream(file);
    root = (TXElement) doc.getDocumentElement();
    TXElement name = (TXElement) root.getElementNamed("Buyer
    Name");
    TXElement address = (TXElement)root.getElementNamed("Buy
    erAddress");
    TXElement street =   (TXElement)address.getElement
    Named("StreetName");
    TXElement city = (TXElement)address.getElement-
    Named("City");
    TXElement state = (TXElement)address.getElement-
    Named("State");
    TXElement zip = (TXElement) address.getElementNamed("Zip
    Code");
    B = new Buyer(name, street, city, state, zip);
}
catch (java.io.IOException e) {
       e.printStackTrace();
}

Listing 3:
try{
     Parser parser = ParserFactory.makeParser(parserClass);
     saxTest handler = new saxTest();
     parser.setDocumentHandler(handler);
     parser.setErrorHandler(handler);
     parser.parse(args[0]);
     System.exit(0);
}
catch (Exception e) {
     e.printStackTrace();
}

public void startElement(String name, AttributeList atts) {
     if (name.equals("OrderNumber"))
     {
       int qty = Integer.parseInt(atts.getValue("Quantity"));
       if (qty >= 500)
       {
            processOrder(filename);
       }
   }
}