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:com.telefonica.iot.cygnus.utils.CommonUtils.java

/**
 * Decides if a given string is a number, given its radix.
 * http://stackoverflow.com/questions/5439529/determine-if-a-string-is-an-integer-in-java
 * @param s//w  ww  .  ja  v a2s.c om
 * @param radix
 * @return
 */
public static boolean isANumber(String s, int radix) {
    if (s.isEmpty()) {
        return false;
    } // if

    for (int i = 0; i < s.length(); i++) {
        if ((i == 0) && (s.charAt(i) == '-')) {
            if (s.length() == 1) {
                return false;
            } // if

            continue;
        } // if

        if ((i == 0) && (s.charAt(i) == '.')) {
            return false;
        } // if

        if ((i == s.length() - 1) && (s.charAt(i) == '.')) {
            return false;
        } // if

        if (s.charAt(i) == '.') {
            continue;
        } // if

        if (Character.digit(s.charAt(i), radix) < 0) {
            return false;
        } // if

    } // for

    return true;
}

From source file:edu.mit.scratch.ScratchCloudSession.java

public static boolean isInteger(final String s, final int radix) {
    if (s.isEmpty())
        return false;
    for (int i = 0; i < s.length(); i++) {
        if ((i == 0) && (s.charAt(i) == '-')) {
            if (s.length() == 1)
                return false;
            else// w  w  w.j a v  a  2 s . c o m
                continue;
        }
        if (Character.digit(s.charAt(i), radix) < 0)
            return false;
    }
    return true;
}

From source file:CodePointInputMethod.java

private void waitDigit2(char c) {
    if (Character.digit(c, 16) != -1) {
        buffer.insert(insertionPoint++, c);
        char codePoint = (char) getCodePoint(buffer, 2, 5);
        if (Character.isHighSurrogate(codePoint)) {
            format = SURROGATE_PAIR;/*from   w  w  w .j  a  v  a  2s.co m*/
            buffer.append("\\u");
            insertionPoint = 8;
        } else {
            format = ESCAPE;
        }
        sendComposedText();
    } else {
        beep();
    }
}

From source file:com.ab.http.PersistentCookieStore.java

/**
 * Hex string to byte array.//www  . j  a  v  a 2  s. c o m
 *
 * @param s the s
 * @return the byte[]
 */
protected byte[] hexStringToByteArray(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));
    }
    return data;
}

From source file:com.github.anba.es6draft.util.TestGlobals.java

private static void optionsFromStage(EnumSet<CompatibilityOption> options, String stage) {
    options.addAll(Arrays.stream(CompatibilityOption.Stage.values()).filter(s -> {
        if (stage.length() == 1 && Character.isDigit(stage.charAt(0))) {
            return s.getLevel() == Character.digit(stage.charAt(0), 10);
        } else {/*from   w  w  w .ja va  2s  .  c om*/
            return s.name().equalsIgnoreCase(stage);
        }
    }).findAny().map(CompatibilityOption::Stage).orElseThrow(IllegalArgumentException::new));
}

From source file:eu.europa.esig.dss.DSSUtils.java

/**
 * Converts a hexadecimal character to an integer.
 *
 * @param ch/*w  w w  . j a v a 2s.  co  m*/
 *            A character to convert to an integer digit
 * @param index
 *            The index of the character in the source
 * @return An integer
 * @throws DSSException
 *             Thrown if ch is an illegal hex character
 */
protected static int toDigit(char ch, int index) throws DSSException {
    int digit = Character.digit(ch, 16);
    if (digit == -1) {
        throw new DSSException("Illegal hexadecimal character " + ch + " at index " + index);
    }
    return digit;
}

From source file:CodePointInputMethod.java

private void waitBackSlashOrLowSurrogate(char c) {
    if (insertionPoint == 6) {
        if (c == '\\') {
            buffer.append(c);/*from  w  w  w  .  j a  v  a 2  s  .  com*/
            buffer.append('u');
            insertionPoint = 8;
            sendComposedText();
        } else if (Character.digit(c, 16) != -1) {
            buffer.append("\\u");
            buffer.append(c);
            insertionPoint = 9;
            sendComposedText();
        } else {
            beep();
        }
    } else {
        beep();
    }
}

From source file:cn.com.loopj.android.http.PersistentCookieStore.java

/**
 * Converts hex values from strings to byte arra
 *
 * @param hexString string of hex-encoded values
 * @return decoded byte array// w w  w.  ja  v a2s .c o m
 */
protected byte[] hexStringToByteArray(String hexString) {
    int len = hexString.length();
    byte[] data = new byte[len / 2];
    for (int i = 0; i < len; i += 2) {
        data[i / 2] = (byte) ((Character.digit(hexString.charAt(i), 16) << 4)
                + Character.digit(hexString.charAt(i + 1), 16));
    }
    return data;
}

From source file:pl.psnc.synat.wrdz.realm.digest.WrdzDigestAuthHandler.java

/**
 * Decodes hex encoded array of characters into byte array.
 * /*from w ww  .  j  ava2 s.c  om*/
 * @param encoded
 *            encoded array of hex symbols.
 * @return decoded array of bytes.
 */
private static byte[] hexDecode(char[] encoded) {
    int len = encoded.length;
    byte[] data = new byte[len / 2];
    for (int i = 0; i < len; i += 2) {
        data[i / 2] = (byte) ((Character.digit(encoded[i], 16) << 4) + Character.digit(encoded[i + 1], 16));
    }
    return data;
}

From source file:org.level28.android.moca.json.ScheduleDeserializer.java

private static int getChar(final char[] s, int index, int multiplier) throws ParseException {
    final char c = s[index];
    if (c >= '0' && c <= '9') {
        return Character.digit(c, 10) * multiplier;
    }// w  ww . j a  va 2s. c o  m
    throw new ParseException("Illegal character", index);
}