# Class UnmodifiableClassException

java.lang.Object
java.lang.Throwable
java.lang.Exception
java.lang.instrument.UnmodifiableClassException

All Implemented Interfaces:
  `Serializable`

public class UnmodifiableClassException extends Exception
Thrown by an implementation of `Instrumentation.redefineClasses` when one of the specified classes cannot be modified.

Since:
  1.5
See Also:
  - `Instrumentation.redefineClasses(java.lang.instrument.ClassDefinition...)`
  - Serialized Form

- ## Constructor Summary

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

- ## Method Summary

  ### 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 Details

  - ### UnmodifiableClassException

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

  - ### UnmodifiableClassException

    public UnmodifiableClassException(String s)
    Constructs an `UnmodifiableClassException` with the specified detail message.
    Parameters:
      `s` - the detail message.