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Get a list of all available newsgroup from a news server |
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This tip shows a way to obtain the list of all available newsgroup from a news server.
import sun.net.nntp.*;
import sun.net.*;
import java.io.*;
import java.util.*;
public class ListGroups extends NntpClient {
public static void main(String[] args) {
String server = "news";
try {
System.out.println("opening server");
NntpClient nc = new NntpClient(server);
System.out.println("asking for help");
nc.serverOutput.println("HELP");
String theLine = "";
DataInputStream dis = new DataInputStream(nc.serverInput);
while ((theLine = dis.readLine()) != null) {
if (theLine.equals(".")) break;
System.out.println(theLine);
}
nc.askServer("QUIT");
nc.closeServer();
}
catch (IOException e) {
System.err.println(e);
}
}
}
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