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.
Constructor Summary | |
NullPointerException()
Constructs a NullPointerException with no detail message. |
|
NullPointerException(String s)
Constructs a NullPointerException with the specified
detail message. |
Methods inherited from class java.lang.Throwable |
getMessage,
printStackTrace,
toString |
Methods inherited from class java.lang.Object |
equals,
getClass,
hashCode,
notify,
notifyAll,
wait,
wait,
wait |
Constructor Detail |
public NullPointerException()
NullPointerException
with no detail message.public NullPointerException(String s)
NullPointerException
with the specified
detail message.s
- the detail message.