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.
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