public class FileNotFoundException extends IOException
 This exception will be thrown by the FileInputStream, FileOutputStream 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.
| Constructor and Description | 
|---|
| FileNotFoundException()Constructs a  FileNotFoundExceptionwithnullas its error detail message. | 
| FileNotFoundException(String s)Constructs a  FileNotFoundExceptionwith the specified detail message. | 
addSuppressed, fillInStackTrace, getCause, getLocalizedMessage, getMessage, getStackTrace, getSuppressed, initCause, printStackTrace, printStackTrace, toStringpublic FileNotFoundException()
FileNotFoundException with null as its error detail message.public FileNotFoundException(@Nullable String s)
FileNotFoundException with the specified detail message. The string s can
 be retrieved later by the Throwable.getMessage()java.lang.Throwable.s - the detail message.