Documentation  › java.lang  › ClassNotFoundException
 
 


  ClassNotFoundException
  public

  Inherits From:   Exception : Throwable : Object
  Conforms To:   none
  Declared In:   java.lang


Exception Description
 
Thrown when an application tries to load in a class through its string name using:
  • The forName method in class Class.
  • The findSystemClass method in class ClassLoader .
  • The loadClass method in class ClassLoader.

but no definition for the class with the specified name could be found.

As of release 1.4, this exception has been retrofitted to conform to the general purpose exception-chaining mechanism. The "optional exception that was raised while loading the class" that may be provided at construction time and accessed via the getException() method is now known as the cause, and may be accessed via the getCause() method, as well as the aforementioned "legacy method."



Class Variables
 
None declared in this exception.


Instance Variables
 
None declared in this exception.


Constructors
 
ClassNotFoundException
public ClassNotFoundException( )

Constructs a ClassNotFoundException with no detail message.


ClassNotFoundException
public ClassNotFoundException( String s )

Constructs a ClassNotFoundException with the specified detail message.


ClassNotFoundException
public ClassNotFoundException( String s, Throwable ex )

Constructs a ClassNotFoundException with the specified detail message and optional exception that was raised while loading the class.


Class Methods
 
None declared in this exception.


Instance Methods
 
getCause
public Throwable getCause( )

Returns the the cause of this exception (the exception that was raised if an error occurred while attempting to load the class; otherwise null).


getException
public Throwable getException( )

Returns the exception that was raised if an error occurred while attempting to load the class. Otherwise, returns null.

This method predates the general-purpose exception chaining facility. The getCause() method is now the preferred means of obtaining this information.



Known Subclasses
 
None.



 
 
  dydoc
  3/10/05