public class NullPointerException extends RuntimeException
null in a
 case where an object is required. These include:
 null object.
 null object.
 null as if it were an array.
 null as if it
     were an array.
 null as if it were a Throwable
     value.
 
 Applications should throw instances of this class to indicate
 other illegal uses of the null object.
 NullPointerException objects may be constructed by the
 virtual machine as if suppression were disabled and/or the
 stack trace was not writable.
| Constructor and Description | 
|---|
| NullPointerException()Constructs a  NullPointerExceptionwith no detail message. | 
| NullPointerException(String s)Constructs a  NullPointerExceptionwith the specified
 detail message. | 
addSuppressed, fillInStackTrace, getCause, getLocalizedMessage, getMessage, getStackTrace, getSuppressed, initCause, printStackTrace, printStackTrace, printStackTrace, setStackTrace, toStringpublic NullPointerException()
NullPointerException with no detail message.public NullPointerException(String s)
NullPointerException with the specified
 detail message.s - the detail message. Submit a bug or feature 
For further API reference and developer documentation, see Java SE Documentation. That documentation contains more detailed, developer-targeted descriptions, with conceptual overviews, definitions of terms, workarounds, and working code examples.
 Copyright © 1993, 2025, Oracle and/or its affiliates.  All rights reserved. Use is subject to license terms. Also see the documentation redistribution policy.