zarinfam

public class PrintTask {

    public static final String RESULT_SUCCESS = "SUCCESS_PRINT";
    public static final String RESULT_FAILURE = "FAILURE_PRINT";
    public static final String RESULT_TIMEOUT = "TIMEOUT_PRINT";
    public static final String RESULT_NOTHING = "NOTHING_RESULT";

    private String result = RESULT_NOTHING;

    public void getResult() throws PrintingException {

zarinfam

public void handlePrinting(String text) {
    try {
        printText(text);
    } catch (PrintingException e) {
        // handle the exception and decide what to do
        // retry or show an error message and ...
        return;
    }
    // successful printing and ...
}

zarinfam

public synchronized void printText(String text) throws PrintingException {
    PrintingListener printingListener = new PrintingListener() {
        @Override
        public void onSuccess(SuccessResult successResult) {
        }

        @Override
        public void onFailure(FailureResult failureResult) {  
        }

zarinfam

public synchronized void printText(String text) throws PrintingException {
    // communication with printer using API here
}

zarinfam

getIntOr0 :: Maybe Int -> Int
getIntOr0 = fromMaybe 0

zarinfam

fromMaybe     :: a -> Maybe a -> a

zarinfam

import Data.List
import Data.Ord

main :: IO ()
main = print $ desort [2,8,7,10,1,9,5,3,4,6]

desort :: [Integer] -> [Integer]
desort = reverse . sort -- better use: sortOn Data.Ord.Down

zarinfam

isPow2Even :: Integer -> Bool
isPow2Even = even . pow2   --instead of: even $ pow2 a

zarinfam

isPow2Even :: Integer -> Bool
isPow2Even a = even $ pow2 a --or even (pow2 a)

zarinfam

main :: IO ()
main = print (pow2 3) -- or print $ pow2 3