Class java.lang.NullPointerException 
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Class java.lang.NullPointerException 

java.lang.Object
   |
   +----java.lang.Exception
           |
           +----java.lang.NullPointerException
public class NullPointerException
extends Exception
Signals use of a null pointer.
Version:
1.7, 31 Jan 1995

NullPointerException()
Constructor.
NullPointerException(String)
Constructor with a detail message.

NullPointerException 
  public NullPointerException()
Constructor.

NullPointerException 

  public NullPointerException(String s)
Constructor with a detail message. 

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