ErrnoException

Kotlin |Java

public final class ErrnoException
extends Exception

java.lang.Object
↳	java.lang.Throwable
	↳	java.lang.Exception
		↳	android.system.ErrnoException

A checked exception thrown when Os methods fail. This exception contains the native errno value, for comparison against the constants in OsConstants, should sophisticated callers need to adjust their behavior based on the exact failure.

Summary

Fields
`public final int`	`errno` The errno value, for comparison with the `E` constants in `OsConstants`.

Public constructors
`ErrnoException(String functionName, int errno)` Constructs an instance with the given function name and errno value.
`ErrnoException(String functionName, int errno, Throwable cause)` Constructs an instance with the given function name, errno value, and cause.

Public methods
`String`	`getMessage()` Converts the stashed function name and errno value to a human-readable string.
`IOException`	`rethrowAsIOException()` Throws an `IOException` with a message based on `getMessage()` and with this instance as the cause.
`SocketException`	`rethrowAsSocketException()` Throws a `SocketException` with a message based on `getMessage()` and with this instance as the cause.

Inherited methods

From class


        
          java.lang.Throwable

`final void`	`addSuppressed(Throwable exception)` Appends the specified exception to the exceptions that were suppressed in order to deliver this exception.
`Throwable`	`fillInStackTrace()` Fills in the execution stack trace.
`Throwable`	`getCause()` Returns the cause of this throwable or `null` if the cause is nonexistent or unknown.
`String`	`getLocalizedMessage()` Creates a localized description of this throwable.
`String`	`getMessage()` Returns the detail message string of this throwable.
`StackTraceElement[]`	`getStackTrace()` Provides programmatic access to the stack trace information printed by `printStackTrace()`.
`final Throwable[]`	`getSuppressed()` Returns an array containing all of the exceptions that were suppressed, typically by the `try`-with-resources statement, in order to deliver this exception.
`Throwable`	`initCause(Throwable cause)` Initializes the cause of this throwable to the specified value.
`void`	`printStackTrace()` Prints this throwable and its backtrace to the standard error stream.
`void`	`printStackTrace(PrintWriter s)` Prints this throwable and its backtrace to the specified print writer.
`void`	`printStackTrace(PrintStream s)` Prints this throwable and its backtrace to the specified print stream.
`void`	`setStackTrace(StackTraceElement[] stackTrace)` Sets the stack trace elements that will be returned by `getStackTrace()` and printed by `printStackTrace()` and related methods.
`String`	`toString()` Returns a short description of this throwable.

From class


        
          java.lang.Object

`Object`	`clone()` Creates and returns a copy of this object.
`boolean`	`equals(Object obj)` Indicates whether some other object is "equal to" this one.
`void`	`finalize()` Called by the garbage collector on an object when garbage collection determines that there are no more references to the object.
`final Class<?>`	`getClass()` Returns the runtime class of this `Object`.
`int`	`hashCode()` Returns a hash code value for the object.
`final void`	`notify()` Wakes up a single thread that is waiting on this object's monitor.
`final void`	`notifyAll()` Wakes up all threads that are waiting on this object's monitor.
`String`	`toString()` Returns a string representation of the object.
`final void`	`wait(long timeoutMillis, int nanos)` Causes the current thread to wait until it is awakened, typically by being notified or interrupted, or until a certain amount of real time has elapsed.
`final void`	`wait(long timeoutMillis)` Causes the current thread to wait until it is awakened, typically by being notified or interrupted, or until a certain amount of real time has elapsed.
`final void`	`wait()` Causes the current thread to wait until it is awakened, typically by being notified or interrupted.

Fields

errno

Added in API level 21

public final int errno

The errno value, for comparison with the E constants in OsConstants.

Public constructors

ErrnoException

Added in API level 21

public ErrnoException (String functionName, 
                int errno)

Constructs an instance with the given function name and errno value.

Parameters
`functionName`	`String`
`errno`	`int`

ErrnoException

Added in API level 21

public ErrnoException (String functionName, 
                int errno, 
                Throwable cause)

Constructs an instance with the given function name, errno value, and cause.

Parameters
`functionName`	`String`
`errno`	`int`
`cause`	`Throwable`

Public methods

getMessage

Added in API level 21

public String getMessage ()

Converts the stashed function name and errno value to a human-readable string. We do this here rather than in the constructor so that callers only pay for this if they need it.

Returns
`String`	the detail message string of this `Throwable` instance (which may be `null`).

rethrowAsIOException

Added in API level 30

public IOException rethrowAsIOException ()

Throws an IOException with a message based on getMessage() and with this instance as the cause.

This method always terminates by throwing the exception. Callers can write throw e.rethrowAsIOException() to make that clear to the compiler.

Returns
`IOException`	This value cannot be `null`.

Throws
`IOException`

rethrowAsSocketException

Added in API level 30

public SocketException rethrowAsSocketException ()

Throws a SocketException with a message based on getMessage() and with this instance as the cause.

This method always terminates by throwing the exception. Callers can write throw e.rethrowAsIOException() to make that clear to the compiler.

Returns
`SocketException`	This value cannot be `null`.

Throws
`SocketException`