Exception de pointeur null

salut,
voila ce code donne une erreur :

Code:

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do{
 
			ControleStartedDeamons.traitement();
 
			ControleStartedDeamons.continuer();
 
			}while(testString != null);
}

l'erreur est dans la méthode continuer() mais j'arrive pas a la trouver
voila la methode continuer : elle sert a lire un fichier jusqu'a trouver une chaine de caractere:

Code:

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public static void continuer(){
		do{
			try {
 
			testString = myTestTextBufferedReader.readLine();
		} catch (IOException ioe) {
			System.out.println("Erreur de parsing !");
		}
 
 
	} while (!testString.equals(stringDebut));
 
	}

l'erreur :

Code:

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Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException
	at ControleStartedDeamons.continuer(ControleStartedDeamons.java:67)
	at LectureDesFichiers.AnalyseFichier(LectureDesFichiers.java:88)
	at ControleStartedDeamons.go(ControleStartedDeamons.java:12)
	at Parcourir$1.actionPerformed(Parcourir.java:60)
	at javax.swing.AbstractButton.fireActionPerformed(Unknown Source)
	at javax.swing.AbstractButton$Handler.actionPerformed(Unknown Source)
	at javax.swing.DefaultButtonModel.fireActionPerformed(Unknown Source)
	at javax.swing.DefaultButtonModel.setPressed(Unknown Source)
	at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(Unknown Source)
	at java.awt.Component.processMouseEvent(Unknown Source)
	at javax.swing.JComponent.processMouseEvent(Unknown Source)
	at java.awt.Component.processEvent(Unknown Source)
	at java.awt.Container.processEvent(Unknown Source)
	at java.awt.Component.dispatchEventImpl(Unknown Source)
	at java.awt.Container.dispatchEventImpl(Unknown Source)
	at java.awt.Component.dispatchEvent(Unknown Source)
	at java.awt.LightweightDispatcher.retargetMouseEvent(Unknown Source)
	at java.awt.LightweightDispatcher.processMouseEvent(Unknown Source)
	at java.awt.LightweightDispatcher.dispatchEvent(Unknown Source)
	at java.awt.Container.dispatchEventImpl(Unknown Source)
	at java.awt.Window.dispatchEventImpl(Unknown Source)
	at java.awt.Component.dispatchEvent(Unknown Source)
	at java.awt.EventQueue.dispatchEvent(Unknown Source)
	at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)
	at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
	at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
	at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
	at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
	at java.awt.EventDispatchThread.run(Unknown Source)

meerci de m'eclairer