| author | psadhukhan |
| Tue, 31 May 2016 12:29:57 +0530 | |
| changeset 39014 | bb1c478f025b |
| parent 25859 | 3317bb8137f4 |
| permissions | -rw-r--r-- |
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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 3.2//EN"> |
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<html> |
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<head> |
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<title>javax.print package</title> |
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<!-- |
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Copyright (c) 2000, 2014, Oracle and/or its affiliates. All rights reserved. |
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DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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This code is free software; you can redistribute it and/or modify it |
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under the terms of the GNU General Public License version 2 only, as |
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published by the Free Software Foundation. Oracle designates this |
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particular file as subject to the "Classpath" exception as provided |
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by Oracle in the LICENSE file that accompanied this code. |
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This code is distributed in the hope that it will be useful, but WITHOUT |
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ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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version 2 for more details (a copy is included in the LICENSE file that |
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accompanied this code). |
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You should have received a copy of the GNU General Public License version |
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2 along with this work; if not, write to the Free Software Foundation, |
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Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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or visit www.oracle.com if you need additional information or have any |
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questions. |
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--> |
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</head> |
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<body bgcolor="white"> |
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Provides the principal classes and interfaces for the |
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Java<sup><font size="-2">TM</font></sup> Print Service API. |
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The Java Print Service API enables client and server applications to: |
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<ul> |
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<li>Discover and select print services based on their capabilities |
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<li>Specify the format of print data |
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<li>Submit print jobs to services that support the document type to |
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be printed. |
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</ul> |
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<h3>Print Service Discovery</h3> |
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<p> |
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An application invokes the static methods of the abstract class |
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{@link javax.print.PrintServiceLookup PrintServiceLookup} to locate print
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services that have the capabilities to satisfy the application's print |
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request. For example, to print a double-sided document, the application |
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first needs to find printers that have the double-sided printing capability. |
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<p> |
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The JDK includes <code>PrintServiceLookup</code> implementations that |
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can locate the standard platform printers. To locate other types of printers, |
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such as IPP printers or JINI printers, a print-service provider can write |
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implementations of <code>PrintServiceLookup</code>. The print-service provider |
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can dynamically install these <code>PrintServiceLookup</code> implementations |
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using the |
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<a href="../../../technotes/guides/jar/jar.html#Service%20Provider"> |
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SPI JAR file specification</a>. |
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<h3>Attribute Definitions</h3> |
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The {@link javax.print.attribute} and {@link javax.print.attribute.standard}
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packages define print attributes, which describe the capabilities of a print |
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service, specify the requirements of a print job, and track the progress of |
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a print job. |
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<p> |
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The <code>javax.print.attribute</code> package describes the types of attributes and |
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how they can be collected into sets. The <code>javax.print.attribute.standard</code> |
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package enumerates all of the standard attributes supported by the API, most |
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of which are implementations of attributes specified in the IETF Specification, |
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<a href="http://www.ietf.org/rfc/rfc2911.txt"> |
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RFC 2911 Internet Printing Protocol, 1.1: Model and Semantics</a>, dated |
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September 2000. The attributes specified in <code>javax.print.attribute.standard</code> |
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include common capabilities, such as: resolution, copies, media sizes, |
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job priority, and page ranges. |
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<h3>Document Type Specification</h3> |
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The {@link javax.print.DocFlavor DocFlavor} class represents the print data
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format, such as JPEG or PostScript. A <code>DocFlavor</code> object |
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consists of a MIME type, which describes the format, and a document |
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representation class name that indicates how the document is delivered |
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to the printer or output stream. An application uses the |
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<code>DocFlavor</code> and an attribute set to find printers that can |
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print the document type specified by the <code>DocFlavor</code> and have |
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the capabilities specified by the attribute set. |
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<h3>Using the API</h3> |
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A typical application using the Java Print Service API performs these steps |
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to process a print request: |
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<ol> |
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<li>Chooses a <code>DocFlavor</code>.</li> |
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<li>Creates a set of attributes.</li> |
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<li>Locates a print service that can handle the print request as specified |
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by the <code>DocFlavor</code> and the attribute set.</li> |
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<li>Creates a {@link javax.print.Doc Doc} object encapsulating the
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<code>DocFlavor</code> |
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and the actual print data, which can take many forms including: a Postscript |
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file, a JPEG image, a URL, or plain text.</li> |
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<li>Gets a print job, represented by {@link javax.print.DocPrintJob DocPrintJob},
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from the print service.</li> |
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<li>Calls the print method of the print job.</li> |
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</ol> |
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The following code sample demonstrates a typical use of the Java Print |
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Service API: locating printers that can print five double-sided copies |
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of a Postscript document on size A4 paper, creating a print job from |
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one of the returned print services, and calling print. |
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<blockquote> |
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<pre> |
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FileInputStream psStream; |
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try {
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psStream = new FileInputStream("file.ps");
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} catch (FileNotFoundException ffne) {
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} |
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if (psStream == null) {
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return; |
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} |
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DocFlavor psInFormat = DocFlavor.INPUT_STREAM.POSTSCRIPT; |
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Doc myDoc = new SimpleDoc(psStream, psInFormat, null); |
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PrintRequestAttributeSet aset = |
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new HashPrintRequestAttributeSet(); |
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aset.add(new Copies(5)); |
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aset.add(MediaSizeName.ISO_A4); |
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aset.add(Sides.DUPLEX); |
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PrintService[] services = |
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PrintServiceLookup.lookupPrintServices(psInFormat, aset); |
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if (services.length > 0) {
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DocPrintJob job = services[0].createPrintJob(); |
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try {
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job.print(myDoc, aset); |
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} catch (PrintException pe) {}
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} |
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</pre> |
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</blockquote> |
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<P> |
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Please note: In the javax.print APIs, a null reference parameter to methods |
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is incorrect unless explicitly documented on the method as having a meaningful |
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interpretation. Usage to the contrary is incorrect coding and may result |
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in a run time exception either immediately or at some later time. |
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IllegalArgumentException and NullPointerException are examples of |
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typical and acceptable run time exceptions for such cases. |
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@since 1.4 |
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</body> |
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</html> |