InvalidClassException

java.io

Class InvalidClassException

java.lang.Object
- java.lang.Throwable
- - java.lang.Exception
  - - java.io.IOException
    - - java.io.ObjectStreamException
      - java.io.InvalidClassException

All Implemented Interfaces:

Serializable
```
public class InvalidClassException
extends ObjectStreamException
```
Thrown when the Serialization runtime detects one of the following problems with a Class.
- The serial version of the class does not match that of the class descriptor read from the stream
- The class contains unknown datatypes
- The class does not have an accessible no-arg constructor
Since:

JDK1.1

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field and Description
`String`	`classname` Name of the invalid class.

Constructor Summary

Constructors

Constructor and Description
`InvalidClassException(String reason)` Report an InvalidClassException for the reason specified.
`InvalidClassException(String cname, String reason)` Constructs an InvalidClassException object.

Method Summary

All Methods

Instance Methods

Concrete Methods
Modifier and Type	Method and Description
`String`	`getMessage()` Produce the message and include the classname, if present.

Methods inherited from class java.lang.Throwable
addSuppressed, fillInStackTrace, getCause, getLocalizedMessage, getStackTrace, getSuppressed, initCause, printStackTrace, printStackTrace, printStackTrace, setStackTrace, toString

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

- Field Detail
  - classname
```
public String classname
```
    Name of the invalid class.
- Constructor Detail
  - InvalidClassException
```
public InvalidClassException(String reason)
```
    Report an InvalidClassException for the reason specified.
    
    Parameters:
    
    reason - String describing the reason for the exception.
  - InvalidClassException
```
public InvalidClassException(String cname,
                             String reason)
```
    Constructs an InvalidClassException object.
    
    Parameters:
    
    cname - a String naming the invalid class.
    
    reason - a String describing the reason for the exception.
- Method Detail
  - getMessage
```
public String getMessage()
```
    Produce the message and include the classname, if present.
    
    Overrides:
    
    getMessage in class Throwable
    
    Returns:
    
    the detail message string of this Throwable instance (which may be null).