Entering this for external customer from the Sun Developer Expert Assistance
program:

Reproducible in Netbeans 6.1

The customer is referring to the Sample Paint application under Netbeans Module.

In the NewCanvasAction.java, he's adding the below code snippet

 public void performAction() {
        
        PrinterJob pj = PrinterJob.getPrinterJob();
        pj.printDialog();

The customer is using - JDK 1.5.0_14.
Run the application.
From Paint Application, select File -> New Canvas (Select New Canvas)
We get to see the following exception:

java.lang.NullPointerException: null pData
        at sun.awt.windows.WComponentPeer.nativeHandleEvent(Native Method)
        at sun.awt.windows.WComponentPeer.handleEvent(WComponentPeer.java:262)
        at java.awt.Component.dispatchEventImpl(Component.java:4060)

But we found that there is no issue when we use JDK 1.6