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import java.net.*;
import java.io.*;
public class CheckMail {
public static void main(String s[]) {
//
// CheckMail [mailServer] [user] [password]
//
try {
CheckMail t = new CheckMail();
int i = t.checkMyMail(s[0], s[1], s[2]);
if (i==0) {
System.out.println("No mail waiting.");
}
else {
System.out.println
("There " + (i==1?"is " :"are ") + i +
" message" +(i==1?"":"s")+ " waiting.");
}
}
catch (Exception e) {
e.printStackTrace();
}
}
private void send(BufferedWriter out, String s) throws IOException {
out.write(s+"\n");
out.flush();
}
private String receive(BufferedReader in) throws IOException {
return in.readLine();
}
private int checkMyMail
(String server, String user, String pass) throws IOException {
Socket s = new Socket(server, 110);
BufferedReader in = new BufferedReader(
new InputStreamReader(s.getInputStream()));
BufferedWriter out = new BufferedWriter(
new OutputStreamWriter(s.getOutputStream()));
receive(in);
send(out, "USER " + user);
receive(in);
send(out, "PASS " + pass);
receive(in);
return getNumberOfMessages(in, out);
}
public int getNumberOfMessages
(BufferedReader in, BufferedWriter out) throws IOException {
int i = 0;
String s;
send(out, "LIST");
receive(in);
while((s = receive(in)) != null) {
if (!(s.equals("."))) {
i++;
}
else
return i;
}
return 0;
}
}