question: @ Override public Enumeration < Option > listOptions ( ) { Vector < Option > result = new Vector < Option > ( ) ; result . addElement ( new Option ( "\tSpecify where to insert the ID. First and last\n" + "\tare valid indexes.(default first)" , "C" , 1 , "-C <index>" ) ) ; result . addElement ( new Option ( "\tName of the new attribute.\n" + "\t(default = 'ID')" , "N" , 1 , "-N <name>" ) ) ; return result . elements ( ) ; }
target:  Returns an enumeration describing the available options.