java.lang.ClassNotFoundException

public class java.lang

ClassNotFoundException

Java SE 6

Extends: Throwable > Exception

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 Throwable#getCause() method, as well as the aforementioned "legacy method."

version 1.21, 11/17/05

since JDK1.0

See also forName(java.lang.String), findSystemClass(java.lang.String), loadClass(java.lang.String, boolean)

Constructors

public

ClassNotFoundException()
Constructs a ClassNotFoundException with no detail message.

public

ClassNotFoundException(String s) Details

Constructs a ClassNotFoundException with the specified detail message.

s	the detail message.

public

ClassNotFoundException(String s, Throwable ex) Details

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

s	the detail message
ex	the exception that was raised while loading the class
since	1.2

Properties

public Throwable

getCause() Details

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

return	the cause of this exception.
since	1.4

public Throwable

getException() Details

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.

return the Exception that was raised while loading a class

since 1.2

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Java SE 6

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