Example usage for java.lang Character isDigit

Introduction

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

Prototype

public static boolean isDigit(int codePoint) 

Source Link

Document

Determines if the specified character (Unicode code point) is a digit.

Usage

From source file:NonNumericDocument.java

@Override
public void insertString(int offs, String str, AttributeSet a) throws BadLocationException {
    if (str == null) {
        return;/*  w  w  w .  ja v a  2 s. c o m*/
    }
    char[] arr = str.toCharArray();
    for (int i = 0; i < arr.length; i++) {
        if (Character.isDigit(arr[i]) || !Character.isLetter(arr[i])) {
            return;
        }
    }
    super.insertString(offs, new String(str), a);
}

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From source file:StringUtils.java

private static int getCharKind(int c) {
    if (c == -1) {
        return EOI;
    }// w w w  .j a  v a 2s. c o  m

    char ch = (char) c;

    if (Character.isLowerCase(ch))
        return LOWER;
    else if (Character.isUpperCase(ch))
        return UPPER;
    else if (Character.isDigit(ch))
        return DIGIT;
    else
        return OTHER;
}

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From source file:Main.java

/**
 * Look at the peer ID and just grab as many readable characters to form the version
 * substring as possible./*from  w w w.  ja  va 2 s.com*/
 */
public static String extractReadableVersionSubstringFromPeerID(String peer_id) {
    for (int i = 0; i < peer_id.length(); i++) {
        char c = peer_id.charAt(i);

        // This is based on All Peers peer ID at the time of writing, e.g:
        //   AP0.70rc30->>...
        if (Character.isLetter(c))
            continue;
        if (Character.isDigit(c))
            continue;
        if (c == '.')
            continue;
        // Must be delimiter character.
        return peer_id.substring(0, i);
    }
    return peer_id;
}

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From source file:Main.java

public static double getJavaVersion() {
    if (javaVersion == null) {
        try {// ww  w  .j  av  a2s .co  m
            String ver = System.getProperties().getProperty("java.version");
            String version = "";
            boolean firstPoint = true;
            for (int i = 0; i < ver.length(); i++) {
                if (ver.charAt(i) == '.') {
                    if (firstPoint) {
                        version += ver.charAt(i);
                    }
                    firstPoint = false;
                } else if (Character.isDigit(ver.charAt(i))) {
                    version += ver.charAt(i);
                }
            }
            javaVersion = new Double(version);
        } catch (Exception ex) {
            javaVersion = 1.3;
        }
    }
    return javaVersion;
}

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From source file:Main.java

/**
 * Convert a packed LCCN String to MARC display format.
 * @param packedLCCN an LCCN String in packed storage format (e.g. 'n  2001050268').
 * @return  an LCCN String in MARC display format (e.g. 'n2001-50268').
 */// w  ww .j  a v  a  2  s .co  m
public static String toLCCNDisplay(String packedLCCN) {
    StringBuffer sb = new StringBuffer();
    if (Character.isDigit(packedLCCN.charAt(2))) {
        sb.append(packedLCCN.substring(0, 2).trim());
        sb.append(packedLCCN.substring(2, 6));
        sb.append("-");
        int i = Integer.parseInt(packedLCCN.substring(6).trim());
        sb.append(Integer.toString(i));
    } else {
        sb.append(packedLCCN.substring(0, 3).trim());
        sb.append(packedLCCN.substring(3, 5));
        sb.append("-");
        int i = Integer.parseInt(packedLCCN.substring(5).trim());
        sb.append(Integer.toString(i));
    }
    return sb.toString();
}

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From source file:com.docd.purefm.commandline.CommandDu.java

public static long du_s(@NonNull final GenericFile file) {
    final List<String> result = CommandLine.executeForResult(new CommandDu(file));
    if (result == null || result.isEmpty()) {
        return 0L;
    }//from   w w w.ja  v a2 s .  c o  m
    final String res = result.get(0);
    final int resLength = res.length();
    final StringBuilder lengthString = new StringBuilder(resLength);
    for (int i = 0; i < resLength; i++) {
        final char character = res.charAt(i);
        if (Character.isDigit(character)) {
            lengthString.append(character);
        } else {
            break;
        }
    }
    try {
        return Long.parseLong(lengthString.toString()) * FileUtils.ONE_KB;
    } catch (NumberFormatException e) {
        return 0L;
    }
}

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From source file:StringUtils.java

/**
 *  Returns true, if the argument contains a number, otherwise false.
 *  In a quick test this is roughly the same speed as Integer.parseInt()
 *  if the argument is a number, and roughly ten times the speed, if
 *  the argument is NOT a number./*  www.  j  a va 2 s.  c  o m*/
 *
 *  @since 2.4
 *  @param s String to check
 *  @return True, if s represents a number.  False otherwise.
 */

public static boolean isNumber(String s) {
    if (s == null)
        return false;

    if (s.length() > 1 && s.charAt(0) == '-')
        s = s.substring(1);

    for (int i = 0; i < s.length(); i++) {
        if (!Character.isDigit(s.charAt(i)))
            return false;
    }

    return true;
}

---

From source file:Main.java

/**
 * Checks the password against a set of rules to determine whether it is
 * considered weak.  The rules are:/* w w w .  j a v a 2  s  . c  om*/
 * </p><p>
 * <ul>
 *   <li>It is at least <code>MIN_PASSWORD_LEN</code> characters long.
 *   <li>At least one lowercase character.
 *   <li>At least one uppercase character.
 *   <li>At least one digit or symbol character.
 * </ul>
 *
 * @param password the password to check.
 *
 * @return <code>true</code> if the password is considered to be weak,
 *         <code>false</code> otherwise.
 */
public static boolean isWeakPassword(String password) {
    boolean hasUC = false;
    boolean hasLC = false;
    boolean hasDigit = false;
    boolean hasSymbol = false;

    if (password.length() < MIN_PASSWORD_LEN) {
        return true;
    }

    for (int ii = 0; ii < password.length(); ++ii) {
        char c;

        c = password.charAt(ii);

        if (Character.isDigit(c))
            hasDigit = true;
        else if (Character.isUpperCase(c))
            hasUC = true;
        else if (Character.isLowerCase(c))
            hasLC = true;
        else
            hasSymbol = true;
    }

    return !(hasUC && hasLC && (hasDigit || hasSymbol));
}

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From source file:biblivre3.administration.reports.ReportUtils.java

public static String formatDeweyString(final String dewey, final int digits) {
    if (StringUtils.isBlank(dewey)) {
        return "";
    }// ww  w.j  a va2 s. c o m

    if (digits == -1) {
        return dewey;
    }

    int i = digits;

    StringBuilder format = new StringBuilder();
    for (char c : dewey.toCharArray()) {
        if (i == 0) {
            break;
        }

        if (Character.isDigit(c)) {
            i--;
        }

        format.append(c);
    }

    if (digits < 3) {
        while (format.length() < 3) {
            format.append("0");
        }
    }

    return format.toString();
}

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From source file:Main.java

/**
 * Make sure an element/attribute name is a valid NCname. Note that the name is assumed non-qualified, i.e. no
 * namespaces (hence the Non Colon Name).
 * //from w w  w.  j a  v a  2  s  .  co m
 * @param name Proposed non-qualified name for an element/attribute.
 * @return Same string, with any invalid characters replaced by the underscore '_' character.
 */
public static String makeValidNCName(String name) {
    if (name == null || name.length() <= 0)
        throw new IllegalArgumentException("Invalid NCName: null or empty not allowed!");
    if (name.equalsIgnoreCase("XML"))
        throw new IllegalArgumentException("Invalid NCName: 'XML' name is reserved!");
    StringBuffer s = new StringBuffer(name);
    char c = name.charAt(0);
    if (!Character.isLetter(c) && c != '_')
        s.setCharAt(0, '_');
    for (int i = 1; i < name.length(); i++) {
        c = name.charAt(i);
        if (!Character.isLetter(c) && !Character.isDigit(c) && c != '_' && c != '.' && c != '-')
            s.setCharAt(i, '_');
    }
    return s.toString();
}

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