# ReflectiveOperationException Added in[API level 19](https://developer.android.com/guide/topics/manifest/uses-sdk-element.html#ApiLevels) # ReflectiveOperationException ``` open class ReflectiveOperationException : Exception ``` |---|---|---|----------------------------------------------------------------------------------------------------------------------------------| | [kotlin.Any](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-any/index.html) |||| | ↳ | [kotlin.Throwable](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-throwable/index.html) ||| | | ↳ | [java.lang.Exception](https://developer.android.com/reference/kotlin/java/lang/Exception) || | | | ↳ | [java.lang.ReflectiveOperationException](https://developer.android.com/reference/kotlin/java/lang/ReflectiveOperationException#) | 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| Known Direct Subclasses [ClassNotFoundException](https://developer.android.com/reference/kotlin/java/lang/ClassNotFoundException),[IllegalAccessException](https://developer.android.com/reference/kotlin/java/lang/IllegalAccessException),[InstantiationException](https://developer.android.com/reference/kotlin/java/lang/InstantiationException),[InvocationTargetException](https://developer.android.com/reference/kotlin/java/lang/reflect/InvocationTargetException),[NoSuchFieldException](https://developer.android.com/reference/kotlin/java/lang/NoSuchFieldException),[NoSuchMethodException](https://developer.android.com/reference/kotlin/java/lang/NoSuchMethodException) |-------------------------------------------------------------------------------------------------------------------------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------| | [ClassNotFoundException](https://developer.android.com/reference/kotlin/java/lang/ClassNotFoundException) | 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`.
| | [IllegalAccessException](https://developer.android.com/reference/kotlin/java/lang/IllegalAccessException) | An IllegalAccessException is thrown when an application tries to reflectively create an instance (other than an array), set or get a field, or invoke a method, but the currently executing method does not have access to the definition of the specified class, field, method or constructor. | | [InstantiationException](https://developer.android.com/reference/kotlin/java/lang/InstantiationException) | Thrown when an application tries to create an instance of a class using the`newInstance`method in class`Class`, but the specified class object cannot be instantiated. | | [InvocationTargetException](https://developer.android.com/reference/kotlin/java/lang/reflect/InvocationTargetException) | InvocationTargetException is a checked exception that wraps an exception thrown by an invoked method or constructor. | | [NoSuchFieldException](https://developer.android.com/reference/kotlin/java/lang/NoSuchFieldException) | Signals that the class doesn't have a field of a specified name. | | [NoSuchMethodException](https://developer.android.com/reference/kotlin/java/lang/NoSuchMethodException) | Thrown when a particular method cannot be found. | | Common superclass of exceptions thrown by reflective operations in core reflection. ## Summary | Public constructors || |---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|---| | [ReflectiveOperationException](https://developer.android.com/reference/kotlin/java/lang/ReflectiveOperationException#ReflectiveOperationException())`()` Constructs a new exception with`null`as its detail message. | | [ReflectiveOperationException](https://developer.android.com/reference/kotlin/java/lang/ReflectiveOperationException#ReflectiveOperationException(kotlin.String))`(`message:` `[String](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-string/index.html)!`)` Constructs a new exception with the specified detail message. | | [ReflectiveOperationException](https://developer.android.com/reference/kotlin/java/lang/ReflectiveOperationException#ReflectiveOperationException(kotlin.String,%20kotlin.Throwable))`(`message:` `[String](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-string/index.html)!`, `cause:` `[Throwable](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-throwable/index.html)!`)` Constructs a new exception with the specified detail message and cause. | | [ReflectiveOperationException](https://developer.android.com/reference/kotlin/java/lang/ReflectiveOperationException#ReflectiveOperationException(kotlin.Throwable))`(`cause:` `[Throwable](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-throwable/index.html)!`)` Constructs a new exception with the specified cause and a detail message of`(cause==null ? null : cause.toString())`(which typically contains the class and detail message of`cause`). | ## Public constructors ### ReflectiveOperationException Added in[API level 19](https://developer.android.com/guide/topics/manifest/uses-sdk-element.html#ApiLevels) ``` ReflectiveOperationException() ``` Constructs a new exception with`null`as its detail message. The cause is not initialized, and may subsequently be initialized by a call to[initCause](https://developer.android.com/reference/kotlin/java/lang/Throwable#initCause(kotlin.Throwable)). ### ReflectiveOperationException Added in[API level 19](https://developer.android.com/guide/topics/manifest/uses-sdk-element.html#ApiLevels) ``` ReflectiveOperationException(message: String!) ``` Constructs a new exception with the specified detail message. The cause is not initialized, and may subsequently be initialized by a call to[initCause](https://developer.android.com/reference/kotlin/java/lang/Throwable#initCause(kotlin.Throwable)). | Parameters || |-----------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------| | `message` | [String](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-string/index.html)!:the detail message. The detail message is saved for later retrieval by the[getMessage()](https://developer.android.com/reference/kotlin/java/lang/Throwable#getMessage())method. | ### ReflectiveOperationException Added in[API level 19](https://developer.android.com/guide/topics/manifest/uses-sdk-element.html#ApiLevels) ``` ReflectiveOperationException(     message: String!,     cause: Throwable!) ``` Constructs a new exception with the specified detail message and cause. Note that the detail message associated with`cause`is*not*automatically incorporated in this exception's detail message. | Parameters || |-----------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------| | `message` | [String](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-string/index.html)!:the detail message (which is saved for later retrieval by the[getMessage()](https://developer.android.com/reference/kotlin/java/lang/Throwable#getMessage())method). | | `cause` | [Throwable](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-throwable/index.html)!:the cause (which is saved for later retrieval by the[getCause()](https://developer.android.com/reference/kotlin/java/lang/Throwable#getCause())method). (A`null`value is permitted, and indicates that the cause is nonexistent or unknown.) | ### ReflectiveOperationException Added in[API level 19](https://developer.android.com/guide/topics/manifest/uses-sdk-element.html#ApiLevels) ``` ReflectiveOperationException(cause: Throwable!) ``` Constructs a new exception with the specified cause and a detail message of`(cause==null ? null : cause.toString())`(which typically contains the class and detail message of`cause`). | Parameters || |---------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------| | `cause` | [Throwable](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-throwable/index.html)!:the cause (which is saved for later retrieval by the[getCause()](https://developer.android.com/reference/kotlin/java/lang/Throwable#getCause())method). (A`null`value is permitted, and indicates that the cause is nonexistent or unknown.) |