# Class FileNotFoundException

java.lang.Object
java.lang.Throwable
java.lang.Exception
java.io.IOException
java.io.FileNotFoundException

All Implemented Interfaces:
  `Serializable`

public class FileNotFoundException extends IOException
Signals that an attempt to open the file denoted by a specified pathname has failed.

This exception will be thrown by the `FileInputStream`, `FileOutputStream`, and `RandomAccessFile` constructors when a file with the specified pathname does not exist. It will also be thrown by these constructors if the file does exist but for some reason is inaccessible, for example when an attempt is made to open a read-only file for writing.

Since:
  1.0
See Also:
  - Serialized Form

- ## Constructor Summary

  Constructors
  Constructor
  Description
  `FileNotFoundException()`
  Constructs a `FileNotFoundException` with `null` as its error detail message.
  `FileNotFoundException(String s)`
  Constructs a `FileNotFoundException` 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

  - ### FileNotFoundException

    public FileNotFoundException()
    Constructs a `FileNotFoundException` with `null` as its error detail message.

  - ### FileNotFoundException

    public FileNotFoundException(String s)
    Constructs a `FileNotFoundException` with the specified detail message. The string `s` can be retrieved later by the `Throwable.getMessage()` method of class `java.lang.Throwable`.
    Parameters:
      `s` - the detail message.