question: @ Override public Enumeration < Option > listOptions ( ) { Vector < Option > newVector = new Vector < Option > ( 3 ) ; newVector . addElement ( new Option ( "\tSpecify the expression to apply. Eg a1^2*a5/log(a7*4.0)." + "\n\tSupported opperators: ,+, -, *, /, ^, log, abs, cos, " + "\n\texp, sqrt, floor, ceil, rint, tan, sin, (, )" + "\n\t(default: a1^2)" , "E" , 1 , "-E <expression>" ) ) ; newVector . addElement ( new Option ( "\tSpecify the name for the new attribute. (default is the " + "expression provided with -E)" , "N" , 1 , "-N <name>" ) ) ; newVector . addElement ( new Option ( "\tDebug. Names attribute with the postfix parse of the " + "expression." , "D" , 0 , "-D" ) ) ; return newVector . elements ( ) ; }
target:  Returns an enumeration describing the available options.