Null pointer exception in code

[Vivek Moyal]

There is a null pointer exception when i run this program please help where i am wrong

  package SpeechMain;

import java.util.Locale;

import javax.speech.*;
import javax.speech.recognition.*;
import javax.speech.synthesis.*;
public class MainSpeech {


	Synthesizer synth;
	Recognizer rec;
	public MainSpeech() {
	
		try {
			synth=Central.createSynthesizer(new SynthesizerModeDesc(Locale.ENGLISH));
			//rec=Central.createRecognizer(null);
			synth.allocate();
			synth.resume();
			synth.speakPlainText("Hello How are u", null);
			synth.waitEngineState(Synthesizer.QUEUE_EMPTY);
			synth.deallocate();
			
		} catch (IllegalArgumentException e) {} 
		catch (EngineException e) {} 
		catch (AudioException e) {}
		catch (EngineStateError e) {} 
		catch (InterruptedException e) {}
	}
	
		public Recognizer createDictationRecogniser() throws IllegalArgumentException, EngineException, SecurityException{
		RecognizerModeDesc requird=new RecognizerModeDesc();
		requird.setDictationGrammarSupported(Boolean.TRUE);
		return Central.createRecognizer(requird);
		
		
	}
		public static void main(String[] args) {
			new MainSpeech();
		}
}

  

error is this

 Exception in thread "main" java.lang.NullPointerException
	at SpeechMain.MainSpeech.<init>(MainSpeech.java:18)
	at SpeechMain.MainSpeech.main(MainSpeech.java:39)
   

[Campbell Ritchie]

It should be obvious from the stack trace and reading line 18 which object is null, and ought not to be.

[Rob Spoor]

Completely unrelated to user interfaces. Moving to Other JSE/JEE APIs.

[Vivek Moyal]

ans this because i dont get any help over the net everywhere is the same code and there is a null pointer exception so please help me

[Rob Spoor]

Central.createSynthesizer(new SynthesizerModeDesc(Locale.ENGLISH)) obviously returns null. I'm not familiar enough with javax.speech to tell you why, but the Javadoc says that Central.createSynthesizer returns

a Synthesizer matching the required properties or null if none is available

.

[Vivek Moyal]

But i want to know that how should i remove the "null pointer exception" because i dont get any help from anyone

[Rob Spoor]

Maybe nobody knows why there isn't a synthesizer available. I certainly don't.

[Vivek Moyal]

I am using this code for text to speech and i have an application which is already doing this that is a dictionary and i want to do this through my code if anybody know any other way to do this than please tell me i am waiting

[uppala sumanth kumar]

Hey i got the same problem stated above .... can any one please help me out

[Ernest Friedman-Hill]

Have you actually (properly) installed a jsapi implementation? Will Central.createSynthesizer() return non-null if you pass "null" for the argument? If not, then you haven't correctly installed your implementation. Follow the directions for whatever you're installing to get it working.

[uppala sumanth kumar]

I've installed correct only and I'm using eclipse IDE....
All thae classes and methods of JSAPI are present int the JRE env for the project...

[Ernest Friedman-Hill]

So which provider did you install? FreeTTS, IBM Speech for Java, ... ?

[uppala sumanth kumar]

I didn't install any thing .. jus pasted that JSAPI into my java - lib folder....
And i'm new to this JSAPI... this is the first time i'm using!!!

[uppala sumanth kumar]

can you please tell me the procedure ...
which provider should i insatll ...
and steps to be followed....!!!