java.awt.print

## Class PrinterJob

- java.lang.Object
- - java.awt.print.PrinterJob

-     public abstract class PrinterJob
      extends Object

  The `PrinterJob` class is the principal class that controls printing. An application calls methods in this class to set up a job, optionally to invoke a print dialog with the user, and then to print the pages of the job.

- - ### Constructor Summary

    Constructors
    Constructor and Description
    `PrinterJob()` A `PrinterJob` object should be created using the static `getPrinterJob` method.

  - ### Method Summary

    Methods
    Modifier and Type | Method and Description
    --- | ---
    `abstract void` | `cancel()` Cancels a print job that is in progress.
    `PageFormat` | `defaultPage()` Creates a new `PageFormat` instance and sets it to a default size and orientation.
    `abstract PageFormat` | `defaultPage(PageFormat page)` Clones the `PageFormat` argument and alters the clone to describe a default page size and orientation.
    `abstract int` | `getCopies()` Gets the number of copies to be printed.
    `abstract String` | `getJobName()` Gets the name of the document to be printed.
    `PageFormat` | `getPageFormat(PrintRequestAttributeSet attributes)` Calculates a `PageFormat` with values consistent with those supported by the current `PrintService` for this job (ie the value returned by `getPrintService()`) and media, printable area and orientation contained in `attributes`.
    `static PrinterJob` | `getPrinterJob()` Creates and returns a `PrinterJob` which is initially associated with the default printer.
    `PrintService` | `getPrintService()` Returns the service (printer) for this printer job.
    `abstract String` | `getUserName()` Gets the name of the printing user.
    `abstract boolean` | `isCancelled()` Returns `true` if a print job is in progress, but is going to be cancelled at the next opportunity; otherwise returns `false`.
    `static PrintService[]` | `lookupPrintServices()` A convenience method which looks up 2D print services.
    `static StreamPrintServiceFactory[]` | `lookupStreamPrintServices(String mimeType)` A convenience method which locates factories for stream print services which can image 2D graphics.
    `abstract PageFormat` | `pageDialog(PageFormat page)` Displays a dialog that allows modification of a `PageFormat` instance.
    `PageFormat` | `pageDialog(PrintRequestAttributeSet attributes)` A convenience method which displays a cross-platform page setup dialog.
    `abstract void` | `print()` Prints a set of pages.
    `void` | `print(PrintRequestAttributeSet attributes)` Prints a set of pages using the settings in the attribute set.
    `abstract boolean` | `printDialog()` Presents a dialog to the user for changing the properties of the print job.
    `boolean` | `printDialog(PrintRequestAttributeSet attributes)` A convenience method which displays a cross-platform print dialog for all services which are capable of printing 2D graphics using the `Pageable` interface.
    `abstract void` | `setCopies(int copies)` Sets the number of copies to be printed.
    `abstract void` | `setJobName(String jobName)` Sets the name of the document to be printed.
    `abstract void` | `setPageable(Pageable document)` Queries `document` for the number of pages and the `PageFormat` and `Printable` for each page held in the `Pageable` instance, `document`.
    `abstract void` | `setPrintable(Printable painter)` Calls `painter` to render the pages.
    `abstract void` | `setPrintable(Printable painter, PageFormat format)` Calls `painter` to render the pages in the specified `format`.
    `void` | `setPrintService(PrintService service)` Associate this PrinterJob with a new PrintService.
    `abstract PageFormat` | `validatePage(PageFormat page)` Returns the clone of `page` with its settings adjusted to be compatible with the current printer of this `PrinterJob`.

    - ### Methods inherited from class java.lang.Object

      `clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

- - ### Constructor Detail

    - #### PrinterJob

          public PrinterJob()

      A `PrinterJob` object should be created using the static `getPrinterJob` method.

  - ### Method Detail

    - #### getPrinterJob

          public static PrinterJob getPrinterJob()

      Creates and returns a `PrinterJob` which is initially associated with the default printer. If no printers are available on the system, a PrinterJob will still be returned from this method, but `getPrintService()` will return `null`, and calling `print` with this `PrinterJob` might generate an exception. Applications that need to determine if there are suitable printers before creating a `PrinterJob` should ensure that the array returned from `lookupPrintServices` is not empty.
      Returns:
        a new `PrinterJob`.
      Throws:
        `SecurityException` - if a security manager exists and its `SecurityManager.checkPrintJobAccess()` method disallows this thread from creating a print job request

    - #### lookupPrintServices

          public static PrintService[] lookupPrintServices()

      A convenience method which looks up 2D print services. Services returned from this method may be installed on `PrinterJob`s which support print services. Calling this method is equivalent to calling `PrintServiceLookup.lookupPrintServices()` and specifying a Pageable DocFlavor.
      Returns:
        a possibly empty array of 2D print services.
      Since:
        1.4

    - #### lookupStreamPrintServices

          public static StreamPrintServiceFactory[] lookupStreamPrintServices(String mimeType)

      A convenience method which locates factories for stream print services which can image 2D graphics. Sample usage :

           FileOutputStream outstream;
           StreamPrintService psPrinter;
           String psMimeType = "application/postscript";
           PrinterJob pj = PrinterJob.getPrinterJob();

           StreamPrintServiceFactory[] factories =
               PrinterJob.lookupStreamPrintServices(psMimeType);
           if (factories.length > 0) {
               try {
                   outstream = new File("out.ps");
                   psPrinter =  factories[0].getPrintService(outstream);
                   // psPrinter can now be set as the service on a PrinterJob
                   pj.setPrintService(psPrinter)
               } catch (Exception e) {
                   e.printStackTrace();
               }
           }

      Services returned from this method may be installed on `PrinterJob` instances which support print services. Calling this method is equivalent to calling `StreamPrintServiceFactory.lookupStreamPrintServiceFactories()` and specifying a Pageable DocFlavor.
      Parameters:
        `mimeType` - the required output format, or null to mean any format.
      Returns:
        a possibly empty array of 2D stream print service factories.
      Since:
        1.4

    - #### getPrintService

          public PrintService getPrintService()

      Returns the service (printer) for this printer job. Implementations of this class which do not support print services may return null. null will also be returned if no printers are available.
      Returns:
        the service for this printer job.
      Since:
        1.4
      See Also:
        `setPrintService(PrintService)`, `getPrinterJob()`

    - #### setPrintService

          public void setPrintService(PrintService service)
                               throws PrinterException

      Associate this PrinterJob with a new PrintService. This method is overridden by subclasses which support specifying a Print Service. Throws `PrinterException` if the specified service cannot support the `Pageable` and `Printable` interfaces necessary to support 2D printing.
      Parameters:
        `service` - a print service that supports 2D printing
      Throws:
        `PrinterException` - if the specified service does not support 2D printing, or this PrinterJob class does not support setting a 2D print service, or the specified service is otherwise not a valid print service.
      Since:
        1.4
      See Also:
        `getPrintService()`

    - #### setPrintable

          public abstract void setPrintable(Printable painter)

      Calls `painter` to render the pages. The pages in the document to be printed by this `PrinterJob` are rendered by the `Printable` object, `painter`. The `PageFormat` for each page is the default page format.
      Parameters:
        `painter` - the `Printable` that renders each page of the document.

    - #### setPrintable

          public abstract void setPrintable(Printable painter,
                          PageFormat format)

      Calls `painter` to render the pages in the specified `format`. The pages in the document to be printed by this `PrinterJob` are rendered by the `Printable` object, `painter`. The `PageFormat` of each page is `format`.
      Parameters:
        `painter` - the `Printable` called to render each page of the document
        `format` - the size and orientation of each page to be printed

    - #### setPageable

          public abstract void setPageable(Pageable document)
                                    throws NullPointerException

      Queries `document` for the number of pages and the `PageFormat` and `Printable` for each page held in the `Pageable` instance, `document`.
      Parameters:
        `document` - the pages to be printed. It can not be `null`.
      Throws:
        `NullPointerException` - the `Pageable` passed in was `null`.
      See Also:
        `PageFormat`, `Printable`

    - #### printDialog

          public abstract boolean printDialog()
                                       throws HeadlessException

      Presents a dialog to the user for changing the properties of the print job. This method will display a native dialog if a native print service is selected, and user choice of printers will be restricted to these native print services. To present the cross platform print dialog for all services, including native ones instead use `printDialog(PrintRequestAttributeSet)`.

      PrinterJob implementations which can use PrintService's will update the PrintService for this PrinterJob to reflect the new service selected by the user.

      Returns:
        `true` if the user does not cancel the dialog; `false` otherwise.
      Throws:
        `HeadlessException` - if GraphicsEnvironment.isHeadless() returns true.
      See Also:
        `GraphicsEnvironment.isHeadless()`

    - #### printDialog

          public boolean printDialog(PrintRequestAttributeSet attributes)
                              throws HeadlessException

      A convenience method which displays a cross-platform print dialog for all services which are capable of printing 2D graphics using the `Pageable` interface. The selected printer when the dialog is initially displayed will reflect the print service currently attached to this print job. If the user changes the print service, the PrinterJob will be updated to reflect this, unless the user cancels the dialog. As well as allowing the user to select the destination printer, the user can also select values of various print request attributes.

      The attributes parameter on input will reflect the applications required initial selections in the user dialog. Attributes not specified display using the default for the service. On return it will reflect the user's choices. Selections may be updated by the implementation to be consistent with the supported values for the currently selected print service.

      As the user scrolls to a new print service selection, the values copied are based on the settings for the previous service, together with any user changes. The values are not based on the original settings supplied by the client.

      With the exception of selected printer, the PrinterJob state is not updated to reflect the user's changes. For the selections to affect a printer job, the attributes must be specified in the call to the `print(PrintRequestAttributeSet)` method. If using the Pageable interface, clients which intend to use media selected by the user must create a PageFormat derived from the user's selections. If the user cancels the dialog, the attributes will not reflect any changes made by the user.

      Parameters:
        `attributes` - on input is application supplied attributes, on output the contents are updated to reflect user choices. This parameter may not be null.
      Returns:
        `true` if the user does not cancel the dialog; `false` otherwise.
      Throws:
        `HeadlessException` - if GraphicsEnvironment.isHeadless() returns true.
        `NullPointerException` - if `attributes` parameter is null.
      Since:
        1.4
      See Also:
        `GraphicsEnvironment.isHeadless()`

    - #### pageDialog

          public abstract PageFormat pageDialog(PageFormat page)
                                         throws HeadlessException

      Displays a dialog that allows modification of a `PageFormat` instance. The `page` argument is used to initialize controls in the page setup dialog. If the user cancels the dialog then this method returns the original `page` object unmodified. If the user okays the dialog then this method returns a new `PageFormat` object with the indicated changes. In either case, the original `page` object is not modified.
      Parameters:
        `page` - the default `PageFormat` presented to the user for modification
      Returns:
        the original `page` object if the dialog is cancelled; a new `PageFormat` object containing the format indicated by the user if the dialog is acknowledged.
      Throws:
        `HeadlessException` - if GraphicsEnvironment.isHeadless() returns true.
      Since:
        1.2
      See Also:
        `GraphicsEnvironment.isHeadless()`

    - #### pageDialog

          public PageFormat pageDialog(PrintRequestAttributeSet attributes)
                                throws HeadlessException

      A convenience method which displays a cross-platform page setup dialog. The choices available will reflect the print service currently set on this PrinterJob.

      The attributes parameter on input will reflect the client's required initial selections in the user dialog. Attributes which are not specified display using the default for the service. On return it will reflect the user's choices. Selections may be updated by the implementation to be consistent with the supported values for the currently selected print service.

      The return value will be a PageFormat equivalent to the selections in the PrintRequestAttributeSet. If the user cancels the dialog, the attributes will not reflect any changes made by the user, and the return value will be null.

      Parameters:
        `attributes` - on input is application supplied attributes, on output the contents are updated to reflect user choices. This parameter may not be null.
      Returns:
        a page format if the user does not cancel the dialog; `null` otherwise.
      Throws:
        `HeadlessException` - if GraphicsEnvironment.isHeadless() returns true.
        `NullPointerException` - if `attributes` parameter is null.
      Since:
        1.4
      See Also:
        `GraphicsEnvironment.isHeadless()`

    - #### defaultPage

          public abstract PageFormat defaultPage(PageFormat page)

      Clones the `PageFormat` argument and alters the clone to describe a default page size and orientation.
      Parameters:
        `page` - the `PageFormat` to be cloned and altered
      Returns:
        clone of `page`, altered to describe a default `PageFormat`.

    - #### defaultPage

          public PageFormat defaultPage()

      Creates a new `PageFormat` instance and sets it to a default size and orientation.
      Returns:
        a `PageFormat` set to a default size and orientation.

    - #### getPageFormat

          public PageFormat getPageFormat(PrintRequestAttributeSet attributes)

      Calculates a `PageFormat` with values consistent with those supported by the current `PrintService` for this job (ie the value returned by `getPrintService()`) and media, printable area and orientation contained in `attributes`.

      Calling this method does not update the job. It is useful for clients that have a set of attributes obtained from `printDialog(PrintRequestAttributeSet attributes)` and need a PageFormat to print a Pageable object.

      Parameters:
        `attributes` - a set of printing attributes, for example obtained from calling printDialog. If `attributes` is null a default PageFormat is returned.
      Returns:
        a `PageFormat` whose settings conform with those of the current service and the specified attributes.
      Since:
        1.6

    - #### validatePage

          public abstract PageFormat validatePage(PageFormat page)

      Returns the clone of `page` with its settings adjusted to be compatible with the current printer of this `PrinterJob`. For example, the returned `PageFormat` could have its imageable area adjusted to fit within the physical area of the paper that is used by the current printer.
      Parameters:
        `page` - the `PageFormat` that is cloned and whose settings are changed to be compatible with the current printer
      Returns:
        a `PageFormat` that is cloned from `page` and whose settings are changed to conform with this `PrinterJob`.

    - #### print

          public abstract void print()
                              throws PrinterException

      Prints a set of pages.
      Throws:
        `PrinterException` - an error in the print system caused the job to be aborted.
      See Also:
        `Book`, `Pageable`, `Printable`

    - #### print

          public void print(PrintRequestAttributeSet attributes)
                     throws PrinterException

      Prints a set of pages using the settings in the attribute set. The default implementation ignores the attribute set.

      Note that some attributes may be set directly on the PrinterJob by equivalent method calls, (for example), copies: `setcopies(int)`, job name: `setJobName(String)` and specifying media size and orientation though the `PageFormat` object.

      If a supported attribute-value is specified in this attribute set, it will take precedence over the API settings for this print() operation only. The following behaviour is specified for PageFormat: If a client uses the Printable interface, then the `attributes` parameter to this method is examined for attributes which specify media (by size), orientation, and imageable area, and those are used to construct a new PageFormat which is passed to the Printable object's print() method. See `Printable` for an explanation of the required behaviour of a Printable to ensure optimal printing via PrinterJob. For clients of the Pageable interface, the PageFormat will always be as supplied by that interface, on a per page basis.

      These behaviours allow an application to directly pass the user settings returned from `printDialog(PrintRequestAttributeSet attributes` to this print() method.

      Parameters:
        `attributes` - a set of attributes for the job
      Throws:
        `PrinterException` - an error in the print system caused the job to be aborted.
      Since:
        1.4
      See Also:
        `Book`, `Pageable`, `Printable`

    - #### setCopies

          public abstract void setCopies(int copies)

      Sets the number of copies to be printed.
      Parameters:
        `copies` - the number of copies to be printed
      See Also:
        `getCopies()`

    - #### getCopies

          public abstract int getCopies()

      Gets the number of copies to be printed.
      Returns:
        the number of copies to be printed.
      See Also:
        `setCopies(int)`

    - #### getUserName

          public abstract String getUserName()

      Gets the name of the printing user.
      Returns:
        the name of the printing user

    - #### setJobName

          public abstract void setJobName(String jobName)

      Sets the name of the document to be printed. The document name can not be `null`.
      Parameters:
        `jobName` - the name of the document to be printed
      See Also:
        `getJobName()`

    - #### getJobName

          public abstract String getJobName()

      Gets the name of the document to be printed.
      Returns:
        the name of the document to be printed.
      See Also:
        `setJobName(java.lang.String)`

    - #### cancel

          public abstract void cancel()

      Cancels a print job that is in progress. If `print` has been called but has not returned then this method signals that the job should be cancelled at the next chance. If there is no print job in progress then this call does nothing.

    - #### isCancelled

          public abstract boolean isCancelled()

      Returns `true` if a print job is in progress, but is going to be cancelled at the next opportunity; otherwise returns `false`.
      Returns:
        `true` if the job in progress is going to be cancelled; `false` otherwise.

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