EchoDemo does not working

[xlebeling]

hey everyone,

i can't get the EchoDemo running.
If i run sudo java com.nqysit.whatsapp.EchoDemo, I get the following:

Exception in thread "main" java.lang.NoClassDefFoundError: com/google/gson/JsonParser at com.nqysit.whatsapp.Client.parseMessages(Client.java:128) at com.nqysit.whatsapp.Client.ListenIncomingMessages(Client.java:58) at com.nqysit.whatsapp.EchoDemo.main(EchoDemo.java:28) Caused by: java.lang.ClassNotFoundException: com.google.gson.JsonParser at java.net.URLClassLoader.findClass(URLClassLoader.java:381) at java.lang.ClassLoader.loadClass(ClassLoader.java:424) at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:331) at java.lang.ClassLoader.loadClass(ClassLoader.java:357) ... 3 more
Does anybody got an idea?

[regonza]

I have the same issue. :(

[yaolau]

lost a gson jar, but i add the jar, it still not work.

[brunodeandrade]

Someone has solved this issue????

[DavidePastore]

Don't forget to launch:

mvn clean install

in Whatsapp directory.

[viveksachdeva]

I am also not able to run but its due to exception "Stream Closed" in method pipe of class Client:

       Exception in thread "main" java.lang.NullPointerException
	at java.io.StringReader.<init>(StringReader.java:50)
	at com.google.gson.JsonParser.parse(JsonParser.java:45)
	at de.robertduda.whatsapp.Client.parseMessages(Client.java:114)
	at de.robertduda.whatsapp.Client.listenIncomingMessages(Client.java:45)
	at de.robertduda.whatsapp.EchoDemo.main(EchoDemo.java:22)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)
	at com.intellij.rt.execution.application.AppMain.main(AppMain.java:147)