O'Reilly logo

Java Cookbook by Ian F. Darwin

Stay ahead with the world's most comprehensive technology and business learning platform.

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, tutorials, and more.

Start Free Trial

No credit card required

Printing: JDK 1.1

Problem

You need to generate hardcopy, and you’re using JDK 1.1.

Solution

Use java.awt.PrintJob . Or, upgrade to JDK 1.2.

Discussion

The JDK 1.1 API puts your program in the driver’s seat: you decide what to print and when to print it. But first, you have to let the user pick a printer, which you can do by calling the Toolkit method getPrinterJob( ). This pops up a platform-specific print chooser dialog, and if the user picks a printer, you get back a PrintJob object (otherwise you get back null). Your program is in charge of pagination (breaking the data into pages) and drawing each page onto a print buffer. How? For each page you want to print, call the PrintJob ’s getGraphics( ) method to retrieve a Graphics object. Use it as you will; any of its draw or fill methods will draw, not to the screen, but onto paper. Your best bet is to pass it to your paint( ) method, if you have one. This is one of the few places where you do call paint( ) directly. When the page is done, call the Graphics object’s dispose( ) method. When the whole print job is done, call the PrintJob’s end( ) method, and you’re finished -- the data is on its way to the printer.

Here’s a little program that displays a simple graphical component called a DemoGFXCanvas. When you click the Print button at the bottom, the program prints the contents of the DemoGFXCanvas (this is shown graphically in Figure 12-6). When you click on the Print button in the main window, the printer dialog shown at ...

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, interactive tutorials, and more.

Start Free Trial

No credit card required