"getText().toURL" sent to chat client reports NullPointerException

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kubriksCube - 30 Nov 2005 13:27 GMT

Hello.
I get a java.lang.NullPointerException when i run my prog. is where i
get the error:

URL u1=new
URL("file",this.hostname,this.hostport,typeField.getText());
data = new Data(u1.getContent());

My objective is to get a string like "c:\1.html" and convert it to a
URL and send it to another chatClient that is connected throught this
jsdt:// protocol... channel, so that this second client can click on
the link received and open the file.

So far i can get the destination client to recieve the text as a
string...any suggestions would be appreciated.

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Thomas Fritsch - 30 Nov 2005 13:50 GMT

> I get a java.lang.NullPointerException when i run my prog. is where i
> get the error:
>
> URL u1=new
> URL("file",this.hostname,this.hostport,typeField.getText());
> data = new Data(u1.getContent());

May be typeField is null, and therefore you get the NullPointerException
on typeField.getText(). But this is only a guess, as I don't see the
exception stack trace, because you didn't post it.

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"Thomas:Fritsch$ops:de".replace(':','.').replace('$','@')

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Paulus de Boska - 30 Nov 2005 13:59 GMT

Did you initialize hostName ?

Paul Hamaker
http://javalessons.com

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Thomas Fritsch - 30 Nov 2005 14:56 GMT

> I get a java.lang.NullPointerException when i run my prog. is where i
> get the error:
>
> URL u1=new
> URL("file",this.hostname,this.hostport,typeField.getText());

BTW: Because hostname and hostport are meaningless for "file" URLs
anyway, you could use this instead of the above:
File file = new File(typeField.getText());
URL u1 = file.toURL();

> data = new Data(u1.getContent());
>
> My objective is to get a string like "c:\1.html" and convert it to a
> URL and ...

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"Thomas:Fritsch$ops:de".replace(':','.').replace('$','@')

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Thomas Hawtin - 30 Nov 2005 16:58 GMT

> File file = new File(typeField.getText());
> URL u1 = file.toURL();

file.toURI().toURL() is better, as File.toURL is broken. I don't really
understand why it hasn't been deprecated.

Tom Hawtin

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Unemployed English Java programmer
http://jroller.com/page/tackline/

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"getText().toURL" sent to chat client reports NullPointerException

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