public
class
ClassNotFoundException
extends ReflectiveOperationException
java.lang.Object | ||||
↳ | java.lang.Throwable | |||
↳ | java.lang.Exception | |||
↳ | java.lang.ReflectiveOperationException | |||
↳ | java.lang.ClassNotFoundException |
Thrown when an application tries to load in a class through its string name using:
forName
method in class Class
.
findSystemClass
method in class
ClassLoader
.
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."
See also:
Public constructors | |
---|---|
ClassNotFoundException()
Constructs a |
|
ClassNotFoundException(String s)
Constructs a |
|
ClassNotFoundException(String s, Throwable ex)
Constructs a |
Public methods | |
---|---|
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 methods | |
---|---|
From
class
java.lang.Throwable
| |
From
class
java.lang.Object
|
ClassNotFoundException ()
Constructs a ClassNotFoundException
with no detail message.
ClassNotFoundException (String s)
Constructs a ClassNotFoundException
with the
specified detail message.
Parameters | |
---|---|
s |
String :
the 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.
Parameters | |
---|---|
s |
String :
the detail message |
ex |
Throwable :
the exception that was raised while loading the class |
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 | |
---|---|
Throwable |
the cause of this exception. |
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.
Returns | |
---|---|
Throwable |
the Exception that was raised while loading a class |