question: @ Override public Enumeration < Option > listOptions ( ) { Vector < Option > result = new Vector < Option > ( ) ; result . addElement ( new Option ( "\tUse double precision format.\n" + "\t(default: single precision)" , "double" , 0 , "-double" ) ) ; result . addElement ( new Option ( "\tUse tabs as separator.\n" + "\t(default: blanks)" , "tabs" , 0 , "-tabs" ) ) ; result . addAll ( Collections . list ( super . listOptions ( ) ) ) ; return result . elements ( ) ; }
target:  Returns an enumeration describing the available options.