public class NullPointerException extends RuntimeException
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 suppression were disabled and/or the stack trace was not writable.
public NullPointerException()
Constructs a NullPointerException
with no detail message.
public NullPointerException(String s)
Constructs a NullPointerException
with the specified detail message.
s
- the detail message.addSuppressed, fillInStackTrace, getCause, getLocalizedMessage, getMessage, getStackTrace, getSuppressed, initCause, printStackTrace, printStackTrace, printStackTrace, setStackTrace, toString
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait
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