Ngasilake String Panjang Tetep

Sugeng sonten sedaya! Aku kudu nulis fungsi sing ngasilake string sing dawane tetep. Bener, ing kawitan marketing iku prasaja, sing cara iku, nanging ana kepinginan kanggo nggawe fungsi iki minangka cepet sabisa. Lan banjur ana pitakonan - carane? Bener aku nggawe kode iki. Cara paling cepet nganti saiki yaiku generateString, nanging aku yakin bisa luwih cepet. public class StringGenerator{ private int strLength; private StringGenerator() { } public static StringGenerator getStringFixedLengthGenerator(int length){ StringGenerator stringGenerator = new StringGenerator(); stringGenerator.setStrLength(length); return stringGenerator; } public void setStrLength(int strLength) { this.strLength = strLength; } public String generateNextFixedString(){ return new String(); } public String generateThreadString() { ExecutorService executor = Executors.newSingleThreadExecutor(); Callable task = () -> { return generateString(strLength/2); }; Future future = executor.submit(task); Future future1 = executor.submit(task); String str = ""; try{ str = future1.get().concat(future.get()); }catch (Exception e){ } executor.shutdown(); return str; } public String generateString(){ return generateString(strLength); } public String generateString(int stringLength) { String characters = "ABCDEFGHIJKLMNOPQRSTUVWXYZ1234567890"; Random rng = new Random(); char[] text = new char[stringLength]; for (int i = 0; i < stringLength; i++) { text[i] = characters.charAt(rng.nextInt(characters.length())); } return new String(text); } public String createRandomString() { String mCHAR = "ABCDEFGHIJKLMNOPQRSTUVWXYZ1234567890"; int STR_LENGTH = strLength; // длина генерируемой строки Random random = new Random(); StringBuilder builder = new StringBuilder(); for (int i = 0; i < STR_LENGTH; i++) { int number = random.nextInt(mCHAR.length()); char ch = mCHAR.charAt(number); builder.append(ch); } return builder.toString(); } }