java - ClassNotFoundException: javax.speech.EngineModeDesc -

the following code i'm writing implement text speech in java using freetts , mbrola.

i have added jars of freetts classpath.

import java.applet.*; import java.awt.*; import java.awt.event.actionevent; import java.awt.event.actionlistener; import javax.speech.central; import javax.speech.enginelist; import javax.speech.enginecreate; import javax.speech.synthesis.synthesizermodedesc; import javax.speech.synthesis.synthesizer; import javax.speech.synthesis.voice; import com.sun.speech.freetts.jsapi.freettsenginecentral; import java.util.locale; import java.awt.event; public class voisedemo extends applet implements actionlistener {   public synthesizer synth;  private static voice kevinhq;  textfield t1;   public void init()  {  button b1 = new button("press me");  add(b1);  b1.addactionlistener(this);  t1 = new textfield(50);  add(t1);   }  public void start()  {  }    public void actionperformed(actionevent e)  {  // synthesizer.speakplaintext(“hello, world!”, null);  try {  setkevinhq(new voice("hitesh",  voice.age_neutral,  voice.gender_male,  null ));    system.setproperty("mbrola.base", "c:/users/sai/downloads/mbrola");  synthesizermodedesc modedesc = new synthesizermodedesc(  null,  "general", /* use “time” or “general” */  locale.us,  boolean.false,  null);  freettsenginecentral central = new freettsenginecentral();  synthesizer synthesizer = null;  synthesizer = central.createsynthesizer( modedesc );  enginelist list = central.createenginelist(modedesc);  if (list.size() > 0) {  enginecreate creator = (enginecreate) list.get(0);  synthesizer = (synthesizer) creator.createengine();  }   if (synthesizer == null) {  system.err.println("cannot create synthesizer");  system.exit(1);  }  //get ready speak  synthesizer.allocate();  synthesizer.resume();  string s1 = t1.gettext();  synthesizer.speakplaintext(s1, null);  synthesizer.waitenginestate(synthesizer.queue_empty);  synthesizer.deallocate();  } catch (exception eq) {  eq.printstacktrace();  }  }  public static void setkevinhq(voice kevinhq) {  voisedemo.kevinhq = kevinhq;  }  public static voice getkevinhq() {  return kevinhq;  }  public void paint(graphics g)  {  } } 

i compiled in command prompt using:

c:\users\sai\desktop\mini project>javac voisedemo.java 

there no compilation errors.

but when ever run using:

c:\users\sai\desktop\mini project>java voisedemo 

i'm getting following runtime errors:

error: jni error has occurred, please check installation , try   again     exception in thread "main" java.lang.noclassdeffounderror: javax/speech/enginemodedesc         @ java.lang.class.getdeclaredmethods0(native method)         @ java.lang.class.privategetdeclaredmethods(unknown source)         @ java.lang.class.privategetmethodrecursive(unknown source)         @ java.lang.class.getmethod0(unknown source)         @ java.lang.class.getmethod(unknown source)         @ sun.launcher.launcherhelper.validatemainclass(unknown source)         @ sun.launcher.launcherhelper.checkandloadmain(unknown source)     caused by: java.lang.classnotfoundexception: javax.speech.enginemodedesc         @ java.net.urlclassloader.findclass(unknown source)         @ java.lang.classloader.loadclass(unknown source)         @ sun.misc.launcher$appclassloader.loadclass(unknown source)         @ java.lang.classloader.loadclass(unknown source)         ... 7 more 

this program part of mini project.

please me solve error.

you need specify class path:

java -cp (fullpathifnotincurrentworkingdirectory)yourjarfile.jar;. voicedemo 

answer taken here