if((keyboard.next()).equals("create"))
{
    xValue = keyboard.nextInt();
    yValue = keyboard.nextInt();

if((keyboard.next().equals("fast")))
{
        pieceType = "FP";
        if((keyboard.next().equals("flexible")))
        {
            pieceType = "FF";
        }
    }


if((keyboard.next().equals("flexible")))
{
        pieceType = "SF";
        if((keyboard.next().equals("fast")))
        {
            pieceType = "FF";
        }
}
}

String NEW_LINE_SIGN = "n";
if (keyboard.next().contains(NEW_LINE_SIGN){ /* .... */ }

Scanner kbd = new Scanner(System.in);
kbd.useDelimiter(System.getProperty("line.separator"));
//you could create a rule automatically with some kind of a rules engine
if(kbd.hasNext("create(\s+)(\d+)(\s+)(\d+)(\s+)(fast|flexible)(\s+)(fast|flexible)")) {
    MatchResult res = kbd.match();
    for(int i = 0; i <= res.groupCount(); ++i) {
        System.out.println(res.group(i));
        //handleRules(res.group(i), i);
    }
}
kbd.close();