Package javax.print
- Discover and select print services based on their capabilities
- Specify the format of print data
- Submit print jobs to services that support the document type to be printed.
Print Service Discovery
An application invokes the static methods of the abstract classPrintServiceLookup to locate print
services that have the capabilities to satisfy the application's print
request. For example, to print a double-sided document, the application first
needs to find printers that have the double-sided printing capability.
The JDK includes PrintServiceLookup implementations that can locate
the standard platform printers. To locate other types of printers, such as
IPP printers or JINI printers, a print-service provider can write
implementations of PrintServiceLookup. The print-service provider can
dynamically install these PrintServiceLookup implementations using
the ServiceLoader facility.
Attribute Definitions
Thejavax.print.attribute and javax.print.attribute.standard
packages define print attributes, which describe the capabilities of a print
service, specify the requirements of a print job, and track the progress of a
print job.
The javax.print.attribute package describes the types of attributes
and how they can be collected into sets. The
javax.print.attribute.standard package enumerates all of the standard
attributes supported by the API, most of which are implementations of
attributes specified in the IETF Specification,
RFC 2911 Internet Printing
Protocol, 1.1: Model and Semantics, dated September 2000. The attributes
specified in javax.print.attribute.standard include common
capabilities, such as: resolution, copies, media sizes, job priority, and
page ranges.
Document Type Specification
TheDocFlavor class represents the print data
format, such as JPEG or PostScript. A DocFlavor object consists of a
MIME type, which describes the format, and a document representation class
name that indicates how the document is delivered to the printer or output
stream. An application uses the DocFlavor and an attribute set to
find printers that can print the document type specified by the
DocFlavor and have the capabilities specified by the attribute set.
Using the API
A typical application using the Java Print Service API performs these steps to process a print request:- Chooses a
DocFlavor. - Creates a set of attributes.
- Locates a print service that can handle the print request as specified
by the
DocFlavorand the attribute set. - Creates a
Docobject encapsulating theDocFlavorand the actual print data, which can take many forms including: a Postscript file, a JPEG image, aURL, or plain text. - Gets a print job, represented by
DocPrintJob, from the print service. - Calls the print method of the print job.
FileInputStream psStream; try { psStream = new FileInputStream("file.ps"); } catch (FileNotFoundException ffne) { } if (psStream == null) { return; } DocFlavor psInFormat = DocFlavor.INPUT_STREAM.POSTSCRIPT; Doc myDoc = new SimpleDoc(psStream, psInFormat, null); PrintRequestAttributeSet aset = new HashPrintRequestAttributeSet(); aset.add(new Copies(5)); aset.add(MediaSizeName.ISO_A4); aset.add(Sides.DUPLEX); PrintService[] services = PrintServiceLookup.lookupPrintServices(psInFormat, aset); if (services.length > 0) { DocPrintJob job = services[0].createPrintJob(); try { job.print(myDoc, aset); } catch (PrintException pe) {} }
Please note: In the javax.print APIs, a null reference
parameter to methods is incorrect unless explicitly documented on the method
as having a meaningful interpretation. Usage to the contrary is incorrect
coding and may result in a run time exception either immediately or at some
later time. IllegalArgumentException and NullPointerException
are examples of typical and acceptable run time exceptions for such cases.
- Since:
- 1.4
-
ClassDescriptionInterface
AttributeExceptionis a mixin interface which a subclass ofPrintExceptioncan implement to report an error condition involving one or more printing attributes that a particular Print Service instance does not support.This interface is used by a printing application to cancel a print job.InterfaceDocspecifies the interface for an object that supplies one piece of print data for a Print Job.ClassDocFlavorencapsulates an object that specifies the format in which print data is supplied to aDocPrintJob.ClassDocFlavor.BYTE_ARRAYprovides predefined static constantDocFlavorobjects for example doc flavors using a byte array (byte[]) as the print data representation class.ClassDocFlavor.CHAR_ARRAYprovides predefined static constantDocFlavorobjects for example doc flavors using a character array (char[]) as the print data representation class.ClassDocFlavor.INPUT_STREAMprovides predefined static constantDocFlavorobjects for example doc flavors using a byte stream (java.io.InputStream) as the print data representation class.ClassDocFlavor.READERprovides predefined static constantDocFlavorobjects for example doc flavors using a character stream (java.io.Reader) as the print data representation class.ClassDocFlavor.SERVICE_FORMATTEDprovides predefined static constantDocFlavorobjects for example doc flavors for service formatted print data.ClassDocFlavor.STRINGprovides predefined static constantDocFlavorobjects for example doc flavors using a string (java.lang.String) as the print data representation class.ClassDocFlavor.URLprovides predefined static constantDocFlavorobjects.This interface represents a print job that can print a specified document with a set of job attributes.InterfaceFlavorExceptionis a mixin interface which a subclass ofPrintExceptioncan implement to report an error condition involving a doc flavor or flavors (classDocFlavor).InterfaceMultiDocspecifies the interface for an object that supplies more than one piece of print data for a Print Job.Obtained from aMultiDocPrintService, aMultiDocPrintJobcan print a specified collection of documents as a single print job with a set of job attributes.InterfaceMultiPrintServiceis the factory for aMultiDocPrintJob.ClassPrintExceptionencapsulates a printing-related error condition that occurred while using a Print Service instance.InterfacePrintServiceis the factory for aDocPrintJob.Implementations of this class provide lookup services for print services (typically equivalent to printers) of a particular type.This class is a collection of UI convenience methods which provide a graphical user dialog for browsing print services looked up through the Java Print Service API.Services may optionally provide UIs which allow different styles of interaction in different roles.This class is an implementation of interfaceDocthat can be used in many common printing requests.This class extendsPrintServiceand represents a print service that prints data in different formats to a client-provided output stream.AStreamPrintServiceFactoryis the factory forStreamPrintServiceinstances, which can print to an output stream in a particular document format described as a mime type.InterfaceURIExceptionis a mixin interface which a subclass ofPrintExceptioncan implement to report an error condition involving aURIaddress.