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
NullPointerException with no detail message. |
NullPointerException(String s)
Constructs a
NullPointerException with the specified
detail message. |
addSuppressed, fillInStackTrace, getCause, getLocalizedMessage, getMessage, getStackTrace, getSuppressed, initCause, printStackTrace, printStackTrace, printStackTrace, setStackTrace, toString
public 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, 2021, Oracle and/or its affiliates. All rights reserved. Use is subject to license terms. Also see the documentation redistribution policy.