?? waitfordone.html
字號:
<HTML>
<HEAD>
<META http-equiv="Content-Type" content="text/html; charset=UTF-8">
<TITLE>Determining When a Print Job Has Finished
(Java Developers Almanac Example)
</TITLE>
<META CONTENT="Patrick Chan" NAME="AUTHOR">
<META CONTENT="Code Examples from The Java Developers Almanac 1.4" NAME="DESCRIPTION">
<META CONTENT="Addison-Wesley/Patrick Chan" NAME="OWNER">
<META CONTENT="3/20/02" NAME="revision">
<STYLE TYPE="text/css">
<!-- BODY CODE {font-family: Courier, Monospace; font-size: 11pt} TABLE, BODY {font-family: Verdana, Arial, Helvetica, sans-serif; font-size: 10pt} PRE {font-family: Courier, Monospace; font-size: 10pt} H3 {font-family: Verdana, Arial, Helvetica, sans-serif; font-size: 11pt} A.eglink {text-decoration: none} A:hover.eglink {text-decoration: underline} -->
</STYLE>
</HEAD>
<BODY>
<TABLE CELLSPACING="0" CELLPADDING="0" BORDER="0">
<TR>
<TD rowspan="3"><A HREF="/?l=ex"><IMG BORDER="0" ALIGN="BOTTOM" HSPACE="10" SRC="/egs/almanac14a.jpg"></A></TD><TD VALIGN="top"><font face="Times" size="6"><b>The Java Developers Almanac 1.4</b></font>
<br>
Order this book from <a href="/cgi-bin/scripts/redirect.pl?l=ex&url=http://www.amazon.com/exec/obidos/ASIN/0201752808/xeo">Amazon</a>.
</TD>
</TR>
<TR>
<TD align="right" valign="bottom">
<FORM method="get" action="/cgi-bin/search/find.pl">
<INPUT size="25" name="words" type="text"><INPUT value="Search" type="submit">
</FORM>
</TD>
</TR>
</TABLE>
<HR color="#6666cc">
<DIV ALIGN="LEFT">
<A HREF="/">Home</A>
>
<A HREF="../index.html">List of Packages</A>
>
<B><A HREF="../javax.print/pkg.html">javax.print</A></B><font color="#666666" SIZE="-2">
[6 examples]
</font>
</DIV><P>
<h3>
e706.
Determining When a Print Job Has Finished</h3>
Since <code>DocPrintJob.print()</code> is not guaranteed to be synchronous, it
is necessary to watch for a print job completion event before closing
the input stream. This example implements a convenient class that you
can use while waiting for a print job to finish.
<pre>
try {
// Open the image file
InputStream is = new BufferedInputStream(
new FileInputStream(<font color="#0066ff"><i>"filename.gif"</i></font>));
// Create the print job
DocPrintJob job = <font color="#0066ff"><i>service</i></font>.createPrintJob();
Doc doc = new SimpleDoc(is, <font color="#0066ff"><i>flavor</i></font>, null);
// Monitor print job events
PrintJobWatcher pjDone = new PrintJobWatcher(job);
// Print it
job.print(doc, null);
// Wait for the print job to be done
pjDone.waitForDone();
// It is now safe to close the input stream
is.close();
} catch (PrintException e) {
} catch (IOException e) {
}
class PrintJobWatcher {
// true iff it is safe to close the print job's input stream
boolean done = false;
PrintJobWatcher(DocPrintJob job) {
// Add a listener to the print job
job.addPrintJobListener(new PrintJobAdapter() {
public void printJobCanceled(PrintJobEvent pje) {
allDone();
}
public void printJobCompleted(PrintJobEvent pje) {
allDone();
}
public void printJobFailed(PrintJobEvent pje) {
allDone();
}
public void printJobNoMoreEvents(PrintJobEvent pje) {
allDone();
}
void allDone() {
synchronized (PrintJobWatcher.this) {
done = true;
PrintJobWatcher.this.notify();
}
}
});
}
public synchronized void waitForDone() {
try {
while (!done) {
wait();
}
} catch (InterruptedException e) {
}
}
}
</pre>
<P><table width="600" CELLSPACING="0" CELLPADDING="2" BORDER="0">
<tr>
<td bgcolor="#6666cc" align="center"><font color="#ffffff">
Related Examples
</font></td>
</tr>
</table>
e704. <a class="eglink" href="BasicPrint.html?l=rel">
The Quintessential Printing Program Using a Printing Service
</a>
<br>
e705. <a class="eglink" href="BasicStream.html?l=rel">
The Quintessential Printing Program Using a Streaming Printing Service
</a>
<br>
e707. <a class="eglink" href="DiscoverAll.html?l=rel">
Discovering Available Print Services
</a>
<br>
e708. <a class="eglink" href="DiscoverStream.html?l=rel">
Discovering Available Streaming Print Services
</a>
<br>
e709. <a class="eglink" href="Cancel.html?l=rel">
Cancelling a Print Job
</a>
<br>
<br>
<br>
<FONT FACE="Verdana, Arial, Helvetica, sans-serif" SIZE="0">
© 2002 Addison-Wesley.
</FONT>
</BODY>
</HTML>
?? 快捷鍵說明
復制代碼
Ctrl + C
搜索代碼
Ctrl + F
全屏模式
F11
切換主題
Ctrl + Shift + D
顯示快捷鍵
?
增大字號
Ctrl + =
減小字號
Ctrl + -