NullPointerException when using array of string in Java

[Sean J]

I use an API to segment the text into sentences. In the future I want to retrieve each sentence in a case of an array of string.

String [] tab = null; 
  for (int i=0; i<annotations.size() i++) { 
				  Annotation annotation = annotations. Get (i); 
  if (annotation!= null && (annotation.getType().equals ("Sentence"))) { 
  DocumentContent content = currDoc.GetContent(); 
      Node = startNode annotation.GetStartNode(); 
         Node = endNode annotation.GetEndNode(); 
         long start = startNode.getOffset(); 
         long end = endNode.getOffset(); 
  tab [i] = content. getContent (start, end). toString (); 
  }

This Code generates an exception: Exception in thread "main" java.lang.NullPointerException.

Note that this same code works fine by putting

System. Out. Println (i + ":" + content. GetContent (start, end). ToString ());

[Modifier]

This Code generates an exception: Exception in thread "main" java.lang.NullPointerException.

You manipulating a null at line mentioned in your exception.

[Lemog]

The problem comes from

String [] tab = null;

or rather that you had not initialized tab.

String [] tab = new String [annotations.size ()]

should solve the problem.