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Not able to use TextIO.putln() method in Networking  RSS feed

 
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Above shown is the code for Client side in networking and the problem is that I am not being able to know why the method TextIO.putln() is not working?
Thanks in advance for any suggestions
 
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What is TextIO? It's not part of Java's standard API, and you have no import for it, so either you wrote it yourself or you forgot to import it.

You really should break up your main() method. It does way way too much, and it's poorly readable.
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