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 with no detail message.
NullPointerException with the specified
detail message.
public NullPointerException()
NullPointerException with no detail message.
public NullPointerException(String s)
NullPointerException with the specified
detail message.
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