Class NullPointerException

All Implemented Interfaces:

Serializable

Since:

1.0

See Also:

Serialized Form

• 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 java.lang.Throwable

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

  Methods declared in class java.lang.Object

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

• 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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