# Class IllegalClassFormatException

java.lang.Object
java.lang.Throwable
java.lang.Exception
java.lang.instrument.IllegalClassFormatException

All Implemented Interfaces:
  `Serializable`

public class IllegalClassFormatException extends Exception
Thrown by an implementation of `ClassFileTransformer.transform` when its input parameters are invalid. This may occur either because the initial class file bytes were invalid or a previously applied transform corrupted the bytes.

Since:
  1.5
See Also:
  - `ClassFileTransformer.transform(ClassLoader, String, Class, ProtectionDomain, byte[])`
  - Serialized Form

## Constructor Summary

Constructors
Constructor
Description
`IllegalClassFormatException()`
Constructs an `IllegalClassFormatException` with no detail message.
`IllegalClassFormatException(String s)`
Constructs an `IllegalClassFormatException` with the specified detail message.

## Method Summary

### Methods declared in class Throwable

`addSuppressed, fillInStackTrace, getCause, getLocalizedMessage, getMessage, getStackTrace, getSuppressed, initCause, printStackTrace, printStackTrace, printStackTrace, setStackTrace, toString`

### Methods declared in class Object

`clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait`

## Constructor Details

### IllegalClassFormatException

public IllegalClassFormatException()
Constructs an `IllegalClassFormatException` with no detail message.

### IllegalClassFormatException

public IllegalClassFormatException(String s)
Constructs an `IllegalClassFormatException` with the specified detail message.

Parameters:
  `s` - the detail message.