Hi All,
I wrote a simple client java code to send a message to the server. However, I ran into some issues when running the code. I have an idea that my issue has alot to do with the libraries that have included. Below, I have included my java code. Secondly, the error that I received when I run the java code. Lastly, the libraries that I use to run the code. I am using eclipse, android Developer Tools Build: v22.6.2-1085508. Please give me suggestions on how to fix the issue …
Code:
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import org.jivesoftware.smack.AbstractXMPPConnection;
import org.jivesoftware.smack.Chat;
import org.jivesoftware.smack.ChatManager;
import org.jivesoftware.smack.ChatManagerListener;
import org.jivesoftware.smack.ConnectionConfiguration;
import org.jivesoftware.smack.MessageListener;
import org.jivesoftware.smack.Roster;
import org.jivesoftware.smack.Roster.SubscriptionMode;
import org.jivesoftware.smack.SmackException.NotConnectedException;
import org.jivesoftware.smack.XMPPException;
import org.jivesoftware.smack.packet.Message;
import org.jivesoftware.smack.tcp.XMPPTCPConnection;
public class SuperSimpleXMPPClient {
private static String userName =" "; // deleted this for obvious reasons
private static String password = " "; // deleted this for obvious reasons
public static void main(String[] args) {
try {
ConnectionConfiguration config = new ConnectionConfiguration(“talk.google.com”, 5222, “gmail.com”);
AbstractXMPPConnection connection = new XMPPTCPConnection(config);
connection.connect();
connection.login(userName, password);
Roster roster = connection.getRoster();
roster.setSubscriptionMode(SubscriptionMode.accept_all);
ChatManager chatmanager = ChatManager.getInstanceFor(connection);
chatmanager.addChatListener(new ChatManagerListener() {
public void chatCreated(final Chat chat, final boolean createdLocally) {
chat.addMessageListener(new MessageListener() {
public void processMessage(Chat chat, Message message) {
String text = message.getBody();
System.out.println("Received message from " + chat.getParticipant() + ": " + text);
if(text != null) {
respondInReverse(chat, text);
}
}
});
}
});
waitForExit();
connection.disconnect();
} catch (Throwable t) {
t.printStackTrace();
}
}
private static void respondInReverse(Chat chat, String text) {
char[] chars = text.toCharArray();
for(int i = 0; i < chars.length / 2; ++i) {
char temp = chars[i];
chars[i] = chars[chars.length - i - 1];
chars[chars.length - i - 1] = temp;
}
String response = new String(chars);
try {
chat.sendMessage(response);
} catch (XMPPException | NotConnectedException e) {
System.out.println(“Unexception while responding!”);
e.printStackTrace();
}
}
private static void waitForExit() throws IOException {
BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
while (!reader.readLine().equals(“exit”)) {
}
}
}
Error:
xception in thread “Smack Packet Reader (0)” java.lang.NoClassDefFoundError: org/jxmpp/util/XmppStringUtils
at org.jivesoftware.smack.ConnectionConfiguration.setServiceName(ConnectionConfigu ration.java:208)
at org.jivesoftware.smack.AbstractXMPPConnection.setServiceName(AbstractXMPPConnec tion.java:473)
at org.jivesoftware.smack.tcp.XMPPTCPConnection.access$700(XMPPTCPConnection.java: 96)
at org.jivesoftware.smack.tcp.XMPPTCPConnection$PacketReader.parsePackets(XMPPTCPC onnection.java:1008)
at org.jivesoftware.smack.tcp.XMPPTCPConnection$PacketReader.access$200(XMPPTCPCon nection.java:876)
at org.jivesoftware.smack.tcp.XMPPTCPConnection$PacketReader$1.run(XMPPTCPConnecti on.java:908)
Caused by: java.lang.ClassNotFoundException: org.jxmpp.util.XmppStringUtils
at java.net.URLClassLoader$1.run(URLClassLoader.java:366)
at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
at java.lang.ClassLoader.loadClass(ClassLoader.java:425)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
at java.lang.ClassLoader.loadClass(ClassLoader.java:358)
… 6 more
org.jivesoftware.smack.SmackException$NoResponseException
at org.jivesoftware.smack.AbstractXMPPConnection.throwConnectionExceptionOrNoRespo nse(AbstractXMPPConnection.java:460)
at org.jivesoftware.smack.tcp.XMPPTCPConnection.access$300(XMPPTCPConnection.java: 96)
at org.jivesoftware.smack.tcp.XMPPTCPConnection$PacketReader.startup(XMPPTCPConnec tion.java:939)
at org.jivesoftware.smack.tcp.XMPPTCPConnection.initConnection(XMPPTCPConnection.j ava:501)
at org.jivesoftware.smack.tcp.XMPPTCPConnection.connectUsingConfiguration(XMPPTCPC onnection.java:459)
at org.jivesoftware.smack.tcp.XMPPTCPConnection.connectInternal(XMPPTCPConnection. java:820)
at org.jivesoftware.smack.AbstractXMPPConnection.connect(AbstractXMPPConnection.ja va:302)
at SuperSimpleXMPPClient.main(SuperSimpleXMPPClient.java:30)
Here are the list of libraries include in the java build path:
smack-core-4.1.0-alpha1-SNAPSHOT.jar
smack-tcp-4.1.0-alpha1-SNAPSHOT.jar
xpp3-1.1.4c.jar
Cheers,
KA