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Module java.base

Package java.lang

Class ClassNotFoundException

java.lang.Object
- java.lang.Throwable
- - java.lang.Exception
  - - java.lang.ReflectiveOperationException
    - - java.lang.ClassNotFoundException

All Implemented Interfaces:
Serializable
```
public classClassNotFoundExceptionextendsReflectiveOperationException
```
Thrown when an application tries to load in a class through its string name using:
- TheforName method in classClass.
- ThefindSystemClass method in classClassLoader .
- TheloadClass 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 thegetException() method is now known as thecause, and may be accessed via theThrowable.getCause() method, as well as the aforementioned "legacy method."
Since:
1.0
See Also:
Class.forName(java.lang.String),ClassLoader.findSystemClass(java.lang.String),ClassLoader.loadClass(java.lang.String, boolean),Serialized Form

Constructor Summary

Constructors
Constructor	Description
`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.

Method Summary
Modifier and Type Method Description
Throwable getException()
Returns the exception that was raised if an error occurred while attempting to load the class.
- Methods declared in class java.lang.Throwable
  addSuppressed,fillInStackTrace,getCause,getLocalizedMessage,getMessage,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 Detail
  - ClassNotFoundException
```
public ClassNotFoundException()
```
    Constructs aClassNotFoundException with no detail message.
  - ClassNotFoundException
```
public ClassNotFoundException(String s)
```
    Constructs aClassNotFoundException with the specified detail message.
    Parameters:
    s - the detail message.
  - ClassNotFoundException
```
public ClassNotFoundException(String s,Throwable ex)
```
    Constructs aClassNotFoundException with the specified detail message and optional exception that was raised while loading the class.
    Parameters:
    s - the detail message
    ex - the exception that was raised while loading the class
    Since:
    1.2
- Method Detail
  - getException
```
public Throwable getException()
```
    Returns the exception that was raised if an error occurred while attempting to load the class. Otherwise, returnsnull.
    This method predates the general-purpose exception chaining facility. TheThrowable.getCause() method is now the preferred means of obtaining this information.
    Returns:
    theException that was raised while loading a class
    Since:
    1.2

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