Example usage for java.lang Character digit

Introduction

In this page you can find the example usage for java.lang Character digit.

Prototype

public static int digit(int codePoint, int radix) 

Source Link

Document

Returns the numeric value of the specified character (Unicode code point) in the specified radix.

Usage

From source file:Main.java

/**
 * Decode/unescape a portion of a URL, to use with the query part ensure {@code plusAsBlank} is true.
 *
 * @param content     the portion to decode
 * @param charset     the charset to use
 * @param plusAsBlank if {@code true}, then convert '+' to space (e.g. for www-url-form-encoded content), otherwise leave as is.
 * @return encoded string/*from   w  ww  .  j av  a2  s. c o m*/
 */
private static String urldecode(final String content, final Charset charset, final boolean plusAsBlank) {
    if (content == null) {
        return null;
    }
    ByteBuffer bb = ByteBuffer.allocate(content.length());
    CharBuffer cb = CharBuffer.wrap(content);
    while (cb.hasRemaining()) {
        char c = cb.get();
        if (c == '%' && cb.remaining() >= 2) {
            char uc = cb.get();
            char lc = cb.get();
            int u = Character.digit(uc, 16);
            int l = Character.digit(lc, 16);
            if (u != -1 && l != -1) {
                bb.put((byte) ((u << 4) + l));
            } else {
                bb.put((byte) '%');
                bb.put((byte) uc);
                bb.put((byte) lc);
            }
        } else if (plusAsBlank && c == '+') {
            bb.put((byte) ' ');
        } else {
            bb.put((byte) c);
        }
    }
    bb.flip();
    return charset.decode(bb).toString();
}

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From source file:Main.java

public static String decodeQ(String str, String charsetName) throws IOException {
    byte[] bs = str.getBytes();
    int len = bs.length;
    int length = 0;
    for (int i = 0; i < len; i++) {
        byte b = bs[i];
        if (b == '=') {
            i++;// w  w w . j  a v a2 s . c o m
            if (i == len)
                break;
            b = bs[i];
            if (b == '\r' || b == '\n') {
                b = bs[++i];
                if (b != '\n') {
                    i--;
                }
                continue;
            }
            int result = -Character.digit(b, 16);
            result *= 16;
            result -= Character.digit(bs[++i], 16);
            bs[length++] = (byte) -result;
        } else {
            bs[length++] = b;
        }
    }
    return new String(bs, 0, length, charsetName);
}

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From source file:com.easemob.dataexport.utils.StringUtils.java

public static byte[] hexToBytes(String hexString) {
    char[] hex = hexString.toCharArray();
    int length = hex.length / 2;
    byte[] rawData = new byte[length];
    for (int i = 0; i < length; i++) {
        int high = Character.digit(hex[i * 2], 16);
        int low = Character.digit(hex[i * 2 + 1], 16);
        int value = (high << 4) | low;
        if (value > 127) {
            value -= 256;/*  www . j a  va 2 s .  c om*/
        }
        rawData[i] = (byte) value;
    }
    return rawData;
}

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From source file:Main.java

public static byte[] fromHex(String s) {
    if (s != null) {
        try {//from  www. j  av a 2  s  . c  o m
            StringBuilder sb = new StringBuilder(s.length());
            for (int i = 0; i < s.length(); i++) {
                char ch = s.charAt(i);
                if (!Character.isWhitespace(ch)) {
                    sb.append(ch);
                }
            }
            s = sb.toString();
            int len = s.length();
            byte[] data = new byte[len / 2];
            for (int i = 0; i < len; i += 2) {
                int hi = (Character.digit(s.charAt(i), 16) << 4);
                int low = Character.digit(s.charAt(i + 1), 16);
                if (hi >= 256 || low < 0 || low >= 16) {
                    return null;
                }
                data[i / 2] = (byte) (hi | low);
            }
            return data;
        } catch (Exception ignored) {
        }
    }
    return null;
}

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From source file:org.archone.ad.ldap.PasswordUtil.java

public static byte[] hexToBytes(char[] hex) {
    int length = hex.length / 2;
    byte[] raw = new byte[length];
    for (int i = 0; i < length; i++) {
        int high = Character.digit(hex[i * 2], 16);
        int low = Character.digit(hex[i * 2 + 1], 16);
        int value = (high << 4) | low;
        if (value > 127) {
            value -= 256;/*www  . ja  va  2s  .  com*/
        }
        raw[i] = (byte) value;
    }
    return raw;
}

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From source file:Main.java

/**
  Convert a hexidecimal string generated by toHexString() back
  into a byte array.//  w ww  . j  ava2 s.  c  o m
        
  @param s String to convert
  @param offset starting character (zero based) to convert.
  @param length number of characters to convert.
        
  @return the converted byte array. Returns null if the length is
  not a multiple of 2.
*/
public static byte[] fromHexString(String s, int offset, int length) {
    if ((length % 2) != 0)
        return null;

    byte[] byteArray = new byte[length / 2];

    int j = 0;
    int end = offset + length;
    for (int i = offset; i < end; i += 2) {
        int high_nibble = Character.digit(s.charAt(i), 16);
        int low_nibble = Character.digit(s.charAt(i + 1), 16);

        if (high_nibble == -1 || low_nibble == -1) {
            // illegal format
            return null;
        }

        byteArray[j++] = (byte) (((high_nibble << 4) & 0xf0) | (low_nibble & 0x0f));
    }
    return byteArray;
}

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From source file:bobs.mcapisignature.CertUtils.java

public static byte[] hexStringToByteArray(String s) {
    s = s.replaceAll(" ", "");
    s = s.replaceAll("-", "");
    s = s.replaceAll(":", "");
    s = s.toUpperCase();/*from   w  w  w  .  j a  va  2 s  . c o m*/
    int len = s.length();
    byte[] data = new byte[len / 2];
    for (int i = 0; i < len; i += 2) {
        data[i / 2] = (byte) ((Character.digit(s.charAt(i), 16) << 4) + Character.digit(s.charAt(i + 1), 16));
    }
    return data;
}

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From source file:com.os.util.PasswordDecoderEncoder.java

public static byte[] convertHexToBytes(String s) {
    int len = s.length();
    byte[] data = new byte[len / 2];
    for (int i = 0; i < len; i += 2) {
        data[i / 2] = (byte) ((Character.digit(s.charAt(i), 16) << 4) + Character.digit(s.charAt(i + 1), 16));
    }/*from w ww . jav  a  2s  .c o m*/
    return data;
}

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From source file:org.apache.hadoop.io.crypto.bee.Hex.java

public static byte[] decode(CharSequence s) {
    int nChars = s.length();

    if (nChars % 2 != 0) {
        throw new IllegalArgumentException("Hex-encoded string must have an even number of characters");
    }/*from  w  w w.j ava2  s  .  c  o m*/

    byte[] result = new byte[nChars / 2];

    for (int i = 0; i < nChars; i += 2) {
        int msb = Character.digit(s.charAt(i), 16);
        int lsb = Character.digit(s.charAt(i + 1), 16);

        if (msb < 0 || lsb < 0) {
            throw new IllegalArgumentException("Non-hex character in input: " + s);
        }
        result[i / 2] = (byte) ((msb << 4) | lsb);
    }
    return result;
}

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From source file:Main.java

/**
 * Converts an ASCII representation of a Bitmap field
 * into a Java BitSet/*from w w w .j a  v a  2s  .co m*/
 * @param b - hex representation
 * @param offset - starting offset
 * @param maxBits - max number of bits (supports 8, 16, 24, 32, 48, 52, 64,.. 128 or 192)
 * @return java BitSet object
 */
public static BitSet hex2BitSet(byte[] b, int offset, int maxBits) {
    int len = maxBits > 64 ? ((Character.digit((char) b[offset], 16) & 0x08) == 8 ? 128 : 64) : maxBits;
    BitSet bmap = new BitSet(len);
    for (int i = 0; i < len; i++) {
        int digit = Character.digit((char) b[offset + (i >> 2)], 16);
        if ((digit & (0x08 >> (i % 4))) > 0) {
            bmap.set(i + 1);
            if (i == 65 && maxBits > 128)
                len = 192;
        }
    }
    return bmap;
}

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