确定何时打印作业已完成

importjava.io.BufferedInputStream;
importjava.io.BufferedOutputStream;
importjava.io.FileInputStream;
importjava.io.FileOutputStream;
importjava.io.InputStream;
importjava.io.OutputStream;

importjavax.print.Doc;
importjavax.print.DocFlavor;
importjavax.print.DocPrintJob;
importjavax.print.SimpleDoc;
importjavax.print.StreamPrintService;
importjavax.print.StreamPrintServiceFactory;
importjavax.print.event.PrintJobAdapter;
importjavax.print.event.PrintJobEvent;

publicclassMain{
publicstaticvoidmain(String[]argv)throwsException{

OutputStreamfos=newBufferedOutputStream(newFileOutputStream("filename.ps"));

DocFlavorflavor=DocFlavor.INPUT_STREAM.GIF;
InputStreamis=newBufferedInputStream(newFileInputStream("filename.gif"));
StreamPrintServiceFactory[]factories=StreamPrintServiceFactory
.lookupStreamPrintServiceFactories(flavor,DocFlavor.BYTE_ARRAY.POSTSCRIPT.getMimeType());

StreamPrintServiceservice=factories[0].getPrintService(fos);
DocPrintJobjob=service.createPrintJob();
Docdoc=newSimpleDoc(is,flavor,null);

PrintJobWatcherpjDone=newPrintJobWatcher(job);

job.print(doc,null);

pjDone.waitForDone();

is.close();
}
}

classPrintJobWatcher{
booleandone=false;

PrintJobWatcher(DocPrintJobjob){
job.addPrintJobListener(newPrintJobAdapter(){
publicvoidprintJobCanceled(PrintJobEventpje){
synchronized(PrintJobWatcher.this){
done=true;
PrintJobWatcher.this.notify();
}
}

publicvoidprintJobCompleted(PrintJobEventpje){
synchronized(PrintJobWatcher.this){
done=true;
PrintJobWatcher.this.notify();
}
}

publicvoidprintJobFailed(PrintJobEventpje){
synchronized(PrintJobWatcher.this){
done=true;
PrintJobWatcher.this.notify();
}
}

publicvoidprintJobNoMoreEvents(PrintJobEventpje){
synchronized(PrintJobWatcher.this){
done=true;
PrintJobWatcher.this.notify();
}
}
});
}

publicsynchronizedvoidwaitForDone(){
try{
while(!done){
wait();
}
}catch(InterruptedExceptione){
}
}
}