JSAPI : Problems with the speech recognition HelloWorld example

Question

I just started off with JSAPI. And I immediately ran into problems. These are the configurations and the stuff I did:
My system:
OS: WinXP
JDK: JDK 6 Update 10
IDE: Netbeans 6.0
I downloaded the FreeTTS.zip from the FreeTTS site [http://freetts.sourceforge.net/docs/index.php] . I expanded it and in the lib folder I ran the jsapi.exe and as a result jsapi.jar war generated.
I included this jar in my project lib as jar.
Then I copy pasted HelloWorld speech recognition example code given in the site : [http://java.sun.com/products/java-media/speech/forDevelopers/jsapi-guide/Recognition.html#11644]
First it gave a compile time error that
rec.deallocate();throws an exception which needs to be handled. Accordingly I surrounded it with a try catch block and caught the exceptions in the manner given below:
   try{
         rec.deallocate();
                    System.exit(0);
                } catch (EngineException ex) {
                    Logger.getLogger(HelloWorld.class.getName()).log(Level.SEVERE, null, ex);
                } catch (EngineStateError ex) {
                    Logger.getLogger(HelloWorld.class.getName()).log(Level.SEVERE, null, ex);
Now the code was compiling without problems.
When I executed the code a runtime exception (NullPointerException) was thrown at the line
      rec.allocate();  in the psvm(String args[])
Can anybody please explain to me where I am going wrong? Or is there something more that needs to be added in the code?
Anxiously waiting to hear from your end.
Thanks and regards,

Answer 1

Hi All,
I am using following code
import javax.speech.*;
import javax.speech.synthesis.*;
import java.util.Locale;
public class HelloWorld {
     public static void main(String args[]) {
          try {
               // Create a synthesizer for English
               Synthesizer synth = Central.createSynthesizer(
                    new SynthesizerModeDesc(Locale.ENGLISH));
                           synth.waitEngineState(Synthesizer.ALLOCATED);
               //Synthesizer synth = Central.createSynthesizer (null);
               // Get it ready to speak
               synth.allocate();
               synth.resume();
               // Speak the "Hello world" string
               synth.speakPlainText("Hello, world!", null);
               // Wait till speaking is done
               synth.waitEngineState(Synthesizer.QUEUE_EMPTY);
               // Clean up
               synth.deallocate();
          } catch (Exception e) {
               e.printStackTrace();
}and i am also getting following error
java.lang.NullPointerException
        at HelloWorld.main(HelloWorld.java:18)My class path is set to
jsapi.jar (extracted from freetts 1.2.1)
freetts.jar
Please i didn't find any solution from past replies so please do help me someone to solve this...
Thanking You....