PdfNull (iText, a Free Java-PDF library 4.2.0 API)

java.lang.Object
- com.itextpdf.text.pdf.PdfObject
- - com.itextpdf.text.pdf.PdfNull

```
public class PdfNull
extends PdfObject
```
PdfNull is the Null object represented by the keyword null.
This object is described in the 'Portable Document Format Reference Manual version 1.7' section 3.2.8 (page 63).

See Also:

PdfObject

- Field Summary
  
  Fields
  Modifier and Type Field Description
  
  static PdfNull PDFNULL
  An instance of the PdfNull-object.
  - Fields inherited from class com.itextpdf.text.pdf.PdfObject
    ARRAY, BOOLEAN, bytes, DICTIONARY, INDIRECT, indRef, NAME, NOTHING, NULL, NUMBER, STREAM, STRING, TEXT_PDFDOCENCODING, TEXT_UNICODE, type
- Constructor Summary
  
  Constructors
  Constructor Description
  
  PdfNull()
  Constructs a PdfNull-object.
- Method Summary
  
  All Methods Instance Methods Concrete Methods
  Modifier and Type Method Description
  
  java.lang.String toString()
  Returns the String-representation of this PdfObject.
  - Methods inherited from class com.itextpdf.text.pdf.PdfObject
    canBeInObjStm, getBytes, getIndRef, isArray, isBoolean, isDictionary, isIndirect, isName, isNull, isNumber, isStream, isString, length, setContent, setIndRef, toPdf, type
  - Methods inherited from class java.lang.Object
    clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

- Field Detail
  - PDFNULL
```
public static final PdfNull PDFNULL
```
    An instance of the PdfNull-object.
- Constructor Detail
  - PdfNull
```
public PdfNull()
```
    Constructs a PdfNull-object.
    You never need to do this yourself, you can always use the static final object PDFNULL.
- Method Detail
  - toString
```
public java.lang.String toString()
```
    Description copied from class: PdfObject
    
    Returns the String-representation of this PdfObject.
    
    Overrides:
    
    toString in class PdfObject
    
    Returns:
    
    a String