Applet printing exception

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Ramu - 04 Jan 2007 05:58 GMT

Hi All,
1) I want to print my html page from applet.If i run my applet
from browser then my applet should be sigened but i am running my
applet from appletviewer then also i am getting exception

Exception in thread "AWT-EventQueue-1" java.lang.NullPointerException
at PrinterApplet.prep(PrinterApplet.java:80)
at PrinterApplet.print(PrinterApplet.java:102)
at PrinterApplet$1.actionPerformed(PrinterApplet.java:55)
at
javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:18
49)
at
javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.jav
a:2169)
at
javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel
.java:420)
at
javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:258
)

and i think my applet need not be signed for the page from which it is
loaded.

2) how can i send my html content to the applet for
printing.anybody suggest me any examples or suggestions in this issue.
thanks in advance.

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Tom Hawtin - 04 Jan 2007 14:05 GMT

> 1) I want to print my html page from applet.If i run my applet
> from browser then my applet should be sigened but i am running my
> applet from appletviewer then also i am getting exception

Certainly from the Plug-In, if you try to print from an unsigned applet,
you should get a dialog asking to proceed. If you are signing a jar
file, you really should know what you are getting in to.

> Exception in thread "AWT-EventQueue-1" java.lang.NullPointerException
> at PrinterApplet.prep(PrinterApplet.java:80)
[quoted text clipped - 12 lines]
> javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:258
> )

That looks like a bug in your program. Your code is attempting to
dereference a null pointer.

> 2) how can i send my html content to the applet for
> printing.anybody suggest me any examples or suggestions in this issue.
> thanks in advance.

Using java.net.URL would be the obvious solution.

Tom Hawtin

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Applet printing exception

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