Serializable
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 | Description |
---|---|
NullPointerException() |
Constructs a NullPointerException with no detail message. |
NullPointerException |
Constructs a NullPointerException with the specified detail message. |
Modifier and Type | Method | Description |
---|---|---|
String |
getMessage() |
Returns the detail message string of this throwable. |
addSuppressed, fillInStackTrace, getCause, getLocalizedMessage, 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.public String getMessage()
If a non-null message was supplied in a constructor it is returned. Otherwise, an implementation specific message or null
is returned.
getMessage
in class Throwable
null
.
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Documentation extracted from Debian's OpenJDK Development Kit package.
Licensed under the GNU General Public License, version 2, with the Classpath Exception.
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https://docs.oracle.com/en/java/javase/21/docs/api/java.base/java/lang/NullPointerException.html