Thrown when an application tries to load in a class through its string name using:
- The
forName
method in classClass
. - The
findSystemClass
method in classClassLoader
. - The
loadClass
method in classClassLoader
.
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 Throwable.getCause()
method, as well as the aforementioned "legacy method."
Public Constructor Summary
ClassNotFoundException()
Constructs a
ClassNotFoundException with no detail message. |
|
ClassNotFoundException(String s)
Constructs a
ClassNotFoundException with the
specified detail message. |
|
ClassNotFoundException(String s, Throwable ex)
Constructs a
ClassNotFoundException with the
specified detail message and optional exception that was
raised while loading the class. |
Public Method Summary
Throwable |
getCause()
Returns the cause of this exception (the exception that was raised
if an error occurred while attempting to load the class; otherwise
null).
|
Throwable |
getException()
Returns the exception that was raised if an error occurred while
attempting to load the class.
|
Inherited Method Summary
Public Constructors
public ClassNotFoundException ()
Constructs a ClassNotFoundException
with no detail message.
public ClassNotFoundException (String s)
Constructs a ClassNotFoundException
with the
specified detail message.
Parameters
s | the detail message. |
---|
Public Methods
public Throwable getCause ()
Returns the cause of this exception (the exception that was raised if an error occurred while attempting to load the class; otherwise null).
Returns
- the cause of this exception.
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 Throwable.getCause()
method is now the preferred means of
obtaining this information.
Returns
- the
Exception
that was raised while loading a class