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try {
  // Requested file does not exist
}catch(FileNotFoundException e) { /* ask the user for a different filename */ }

// when recovery is possible at higher levels
private void doSomething() throws IOExceptionFileNotFoundException {
  // Requested file does not exist; throws FileNotFoundException
  // Higher level code can handle it by displaying a dialog box and asking 
  // the user for the file name
}

try {
  // Requested file does not exist
  // User is unable to supply the file name
}catch(FileNotFoundException e) { 
  throw new RuntimeException("Cannot proceed with operation"e);
}