Example usage for java.util Arrays fill

Introduction

In this page you can find the example usage for java.util Arrays fill.

Prototype

public static void fill(Object[] a, Object val)

Source Link

Document

Assigns the specified Object reference to each element of the specified array of Objects.

Usage

From source file:Main.java

public static String padString(String s, char padChar, int length) {
    int slen, numPads = 0;
    if (s == null) {
        s = "";/*from  ww  w.  j  a v a  2  s  .  com*/
        numPads = length;
    } else if ((slen = s.length()) > length) {
        s = s.substring(0, length);
    } else if (slen < length) {
        numPads = length - slen;
    }
    if (numPads == 0) {
        return s;
    }
    char[] c = new char[numPads];
    Arrays.fill(c, padChar);
    return s + new String(c);
}

From source file:Main.java

public static String rightPadString(String s, char padChar, int length) {
    int slen, numPads = 0;
    if (s == null) {
        s = "";//w  ww. ja va 2 s. c  om
        numPads = length;
    } else if ((slen = s.length()) > length) {
        s = s.substring(length);
    } else if (slen < length) {
        numPads = length - slen;
    }
    if (numPads == 0) {
        return (s);
    }
    char[] c = new char[numPads];
    Arrays.fill(c, padChar);
    return new String(c) + s;
}

From source file:Main.java

public static Class[] params(Class cls1, Class cls2, Class clsFill, int times) {
    Class[] classes = new Class[times + 2];
    Arrays.fill(classes, clsFill);
    classes[0] = cls1;//from w w  w  .j a  v  a 2 s  .c  om
    classes[1] = cls2;
    return classes;
}

From source file:Main.java

public static void zeroize(char[] secret) {
    if (secret != null)
        Arrays.fill(secret, '\0');
}

From source file:Main.java

public static String repeatingChars(char toRepeat, int number) {
    char[] chars = new char[number];
    Arrays.fill(chars, toRepeat);
    return new String(chars);
}

From source file:Main.java

public static int[] columnChecksums(BufferedImage img) {

    int[] sums = new int[img.getWidth()];
    Arrays.fill(sums, 0);

    for (int y = 0; y < img.getHeight(); y++) {
        for (int x = 0; x < img.getWidth(); x++) {
            final int colour = img.getRGB(x, y);
            sums[x] += (int) ((colour & 0x00ff0000) >> 16);
            sums[x] += (int) ((colour & 0x0000ff00) >> 8);
            sums[x] += (int) (colour & 0x000000ff);
        }//from  www .j a  va2  s.c o  m
    }

    for (int x = 0; x < img.getWidth(); x++) {
        sums[x] %= 256;
    }

    return sums;
}

From source file:Main.java

public static byte[] padRight(byte[] tgt, int len, byte padding) {
    if (tgt.length >= len) {
        return tgt;
    }/*from   w ww. j av a2 s  .  co  m*/
    byte[] paddings = new byte[len - tgt.length];
    Arrays.fill(paddings, padding);
    ByteBuffer buffer = ByteBuffer.allocate(len);

    buffer.put(tgt);
    buffer.put(paddings);

    return buffer.array();
}

From source file:Main.java

public static void writeCString(OutputStream out, String s, int fixedLen) throws IOException {
    byte[] bytes = s.getBytes();
    out.write(bytes.length);//from w w w .j a  v a 2 s.  com
    fixedLen -= 1;

    if (fixedLen <= 0)
        return;

    if (fixedLen <= bytes.length) {
        out.write(bytes, 0, fixedLen);
    } else {
        out.write(bytes);
        byte[] fillBytes = new byte[fixedLen - bytes.length];
        Arrays.fill(fillBytes, (byte) 0);
        out.write(fillBytes);
    }

    out.flush();
}

From source file:Main.java

private static String digest(final String value) {
    final byte[] digested;
    try {/*ww  w  .j  a v a  2s .  c  o  m*/
        digested = MessageDigest.getInstance(HASH_ALGORITHM).digest(value.getBytes(CHARSET));
    } catch (final NoSuchAlgorithmException e) {
        return null;
    } catch (final UnsupportedEncodingException e) {
        return null;
    }

    final String hashed = new BigInteger(1, digested).toString(16);
    final int padding = HASH_LENGTH - hashed.length();
    if (padding == 0) {
        return hashed;
    }

    final char[] zeros = new char[padding];
    Arrays.fill(zeros, '0');
    return new StringBuilder(HASH_LENGTH).append(zeros).append(hashed).toString();
}

From source file:Main.java

public static byte[] encipherAes256(byte[] clearText, String keyString) throws NullPointerException {
    if (keyString == null || keyString.length() == 0) {
        throw new NullPointerException("Please give Password");
    }/*from   w  w  w. ja v  a2  s  .c  o  m*/

    if (clearText == null || clearText.length <= 0) {
        throw new NullPointerException("Please give clearText");
    }

    try {
        SecretKeySpec skeySpec = getKey(keyString);

        // IMPORTANT TO GET SAME RESULTS ON iOS and ANDROID
        final byte[] iv = new byte[16];
        Arrays.fill(iv, (byte) 0x00);
        IvParameterSpec ivParameterSpec = new IvParameterSpec(iv);

        // Cipher is not thread safe
        Cipher cipher = Cipher.getInstance("AES/CBC/PKCS7Padding");
        cipher.init(Cipher.ENCRYPT_MODE, skeySpec, ivParameterSpec);

        return cipher.doFinal(clearText);

    } catch (InvalidKeyException e) {
        e.printStackTrace();
    } catch (UnsupportedEncodingException e) {
        e.printStackTrace();
    } catch (NoSuchAlgorithmException e) {
        e.printStackTrace();
    } catch (BadPaddingException e) {
        e.printStackTrace();
    } catch (NoSuchPaddingException e) {
        e.printStackTrace();
    } catch (IllegalBlockSizeException e) {
        e.printStackTrace();
    } catch (InvalidAlgorithmParameterException e) {
        e.printStackTrace();
    }
    return null;
}