# Print output for @column tags ?>
public
class
NullPointerException
extends RuntimeException
java.lang.Object | ||||
↳ | java.lang.Throwable | |||
↳ | java.lang.Exception | |||
↳ | java.lang.RuntimeException | |||
↳ | java.lang.NullPointerException |
Thrown when an application attempts to use 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 Throwable#Throwable(String,
Throwable, boolean, boolean).
Public constructors | |
---|---|
NullPointerException()
Constructs a |
|
NullPointerException(String s)
Constructs a |
Inherited methods | |
---|---|
public NullPointerException ()
Constructs a NullPointerException
with no detail message.
public NullPointerException (String s)
Constructs a NullPointerException
with the specified
detail message.
Parameters | |
---|---|
s |
String : the detail message. |