1. Description
2. Constructor Summary
3. Method Summary
4. Constructor Details
   1. NullPointerException()
   2. NullPointerException(String)
5. Method Details
   1. getMessage()

• Constructor Summary

  Constructors
  Constructor

  Description

  NullPointerException()

  Constructs a NullPointerException with no detail message.

  NullPointerException(String s)

  Constructs a NullPointerException with the specified detail message.

• Method Summary

  All MethodsInstance MethodsConcrete Methods

  Modifier and Type

  Method

  Description

  String

  getMessage()

  Returns the detail message string of this throwable.

  Methods declared in class Throwable

  addSuppressed, fillInStackTrace, getCause, getLocalizedMessage, getStackTrace, getSuppressed, initCause, printStackTrace, printStackTrace, printStackTrace, setStackTrace, toString

  Modifier and Type

  Method

  Description

  final void

  addSuppressed(Throwable exception)

  Appends the specified exception to the exceptions that were suppressed in order to deliver this exception.

  Throwable

  fillInStackTrace()

  Fills in the execution stack trace.

  Throwable

  getCause()

  Returns the cause of this throwable or null if the cause is nonexistent or unknown.

  String

  getLocalizedMessage()

  Creates a localized description of this throwable.

  StackTraceElement[]

  getStackTrace()

  Provides programmatic access to the stack trace information printed by Throwable.printStackTrace().

  final Throwable[]

  getSuppressed()

  Returns an array containing all of the exceptions that were suppressed, typically by the try-with-resources statement, in order to deliver this exception.

  Throwable

  initCause(Throwable cause)

  Initializes the cause of this throwable to the specified value.

  void

  printStackTrace()

  Prints this throwable and its backtrace to the standard error stream.

  void

  printStackTrace(PrintStream s)

  Prints this throwable and its backtrace to the specified print stream.

  void

  printStackTrace(PrintWriter s)

  Prints this throwable and its backtrace to the specified print writer.

  void

  setStackTrace(StackTraceElement[] stackTrace)

  Sets the stack trace elements that will be returned by Throwable.getStackTrace() and printed by Throwable.printStackTrace() and related methods.

  String

  toString()

  Returns a short description of this throwable.

  Methods declared in class Object

  clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

  Modifier and Type

  Method

  Description

  protected Object

  clone()

  Creates and returns a copy of this object.

  boolean

  equals(Object obj)

  Indicates whether some other object is "equal to" this one.

  protected void

  finalize()

  Deprecated, for removal: This API element is subject to removal in a future version.

  Finalization is deprecated and subject to removal in a future release.

  final Class<?>

  getClass()

  Returns the runtime class of this Object.

  int

  hashCode()

  Returns a hash code value for this object.

  final void

  notify()

  Wakes up a single thread that is waiting on this object's monitor.

  final void

  notifyAll()

  Wakes up all threads that are waiting on this object's monitor.

  final void

  wait()

  Causes the current thread to wait until it is awakened, typically by being notified or interrupted.

  final void

  wait(long timeoutMillis)

  Causes the current thread to wait until it is awakened, typically by being notified or interrupted, or until a certain amount of real time has elapsed.

  final void

  wait(long timeoutMillis, int nanos)

  Causes the current thread to wait until it is awakened, typically by being notified or interrupted, or until a certain amount of real time has elapsed.

• Constructor Details

  • NullPointerException

    public NullPointerException()

    Constructs a NullPointerException with no detail message.

  • NullPointerException

    public NullPointerException(String s)

    Constructs a NullPointerException with the specified detail message.

    Parameters: s - the detail message.

• Method Details

  • getMessage

    public String getMessage()

    Returns the detail message string of this throwable.

    If a non-null message was supplied in a constructor it is returned. Otherwise, an implementation specific message or null is returned.

    Overrides: getMessage in class Throwable Implementation Note: If no explicit message was passed to the constructor, and as long as certain internal information is available, a verbose description of the null reference is returned. The internal information is not available in deserialized NullPointerExceptions. Returns: the detail message string, which may be null.

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