question: @ Override public Enumeration < Option > listOptions ( ) { Vector < Option > result = new Vector < Option > ( ) ; result . add ( new Option ( "\tEnables debug output.\n" + "\t(default: off)" , "D" , 0 , "-D" ) ) ; result . add ( new Option ( "\tStores the filename in an additional attribute.\n" + "\t(default: off)" , "F" , 0 , "-F" ) ) ; result . add ( new Option ( "\tThe directory to work on.\n" + "\t(default: current directory)" , "dir" , 0 , "-dir <directory>" ) ) ; result . add ( new Option ( "\tThe character set to use, e.g UTF-8.\n\t" + "(default: use the default character set)" , "charset" , 1 , "-charset <charset name>" ) ) ; return result . elements ( ) ; }
target:  Lists the available options