Is there any specific protocol for handling exceptions in public methods? Consider this eg.

public int someMethod()
{
  try{
  code that might throw an exception    
  }
  catch(Exception e)
  {
     log the exception
  }
}

Say that this method might throw an ArrayIndexOutOfBoundsException. So, is it correct to handle this Exception in the method itself (as in the example) or throw it and assume that the calling method will handle the Exception?