Interacting with the Environment - Java - page 76

/** Construct a GetOpt parser, storing the set of option characters.
* This is a legacy constructor for backward compatibility.
* That said, it is easier to use if you don't need long-name options,
* so it has not been and will not be marked "deprecated".
*/
public

public GetOpt ( final final String patt ) {

iif ( patt == null null ) {

throw throw new new IllegalArgumentException ( "Pattern may not be null" );

}
iif ( patt . charAt ( 0 ) == ':' ) {
throw throw new new IllegalArgumentException (

"Pattern incorrect, may not begin with ':'" );

}

// Pass One: just count the option letters in the pattern
int int n = 0 ;

for

for ( char char ch : patt . toCharArray ()) {

iif ( ch != ':' )
++ n ;

}
iif ( n == 0 ) {
throw

throw new new IllegalArgumentException (

"No option letters found in " + patt );

}

// Pass Two: construct an array of GetOptDesc objects.
options = new

new GetOptDesc [ n ];

for for ( int int i = 0 , ix = 0 ; i < patt . length (); i ++) {

final

char c = patt . charAt ( i );
boolean

final char

false ;
iif ( i < patt . length () - 1 && patt . charAt ( i + 1 ) == ':' ) {
argTakesValue = true

boolean argTakesValue = false

true ;

++ i ;

}
Debug . println ( "getopt" ,
"CONSTR: options[" + ix + "] = " + c + ", " + argTakesValue );
options [ ix ++] = new new GetOptDesc ( c , null null , argTakesValue );

}

}

/** Reset this GetOpt parser */
public

public void void rewind () {

fileNameArguments = null null ;

done = false false ;

optind = 0 ;