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:Main.java

public static String getOnlyNumerics(String str) {
    if (str == null)
        return null;
    StringBuilder strBuff = new StringBuilder();
    char c;//from w  w w  .  ja v  a2  s  . c  o m
    for (int i = 0; i < str.length(); i++) {
        c = str.charAt(i);
        if (Character.isDigit(c))
            strBuff.append(c);
    }
    return strBuff.toString();
}

From source file:Main.java

public static String getOnlyNumerics(String str) {
    if (str == null) {
        return null;
    }//from  w w  w. java 2  s.  co m

    StringBuffer strBuff = new StringBuffer();
    char c;
    for (int i = 0; i < str.length(); i++) {
        c = str.charAt(i);
        if (Character.isDigit(c)) {
            strBuff.append(c);
        }
    }
    return strBuff.toString();
}

From source file:Main.java

public static String shortName(String hostname) {
    if (hostname == null)
        return null;

    int index = hostname.indexOf('.');
    if (index > 0 && !Character.isDigit(hostname.charAt(0)))
        return hostname.substring(0, index);
    else// www. j a  v  a2 s  .c  o m
        return hostname;
}

From source file:Main.java

public static String getOnlyNumerics(String input) {
    if (input == null)
        return null;

    StringBuilder strBuff = new StringBuilder();

    for (int i = 0; i < input.length(); i++) {
        char c = input.charAt(i);

        if (Character.isDigit(c))
            strBuff.append(c);/*from  ww  w.jav a 2 s  .c o  m*/
    }

    return strBuff.toString();
}

From source file:Main.java

public static String toPersianNumbers(String str) {
    char[] persianNumbers = { '\u06F0', '\u06F1', '\u06F2', '\u06F3', '\u06F4', '\u06F5', '\u06F6', '\u06F7',
            '\u06F8', '\u06F9' };
    StringBuilder builder = new StringBuilder();
    for (int i = 0; i < str.length(); i++) {
        if (Character.isDigit(str.charAt(i))) {
            builder.append(persianNumbers[(int) (str.charAt(i)) - 48]);
        } else {/*from   ww  w  .  j  a v a2s  . com*/
            builder.append(str.charAt(i));
        }
    }

    return builder.toString();
}

From source file:Main.java

public static String getOnlyNumerics(String str) {
    if (str == null) {
        return null;
    }//from w ww . j  av a 2 s . c  om
    StringBuilder strBuff = new StringBuilder();
    char c;
    for (int i = 0; i < str.length(); i++) {
        c = str.charAt(i);
        if (Character.isDigit(c)) {
            strBuff.append(c);
        }
    }
    return strBuff.toString();
}

From source file:Main.java

public static boolean containsOnlyNumbers(String str) {
    if (str == null || str.length() == 0) {
        return false;
    }//from ww w  .  j a va2  s.co m

    //Replace '-'
    str = str.replaceAll("-", "");

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

    return true;
}

From source file:Main.java

public static boolean isPrintable(char c) {
    if (Character.isJavaIdentifierStart(c)) {
        // Letters and $ _
        return true;
    }//from w w w  .  j ava 2  s .  com
    if (Character.isDigit(c)) {
        return true;
    }
    switch (Character.getType(c)) {
    case Character.MODIFIER_SYMBOL:
        return true; // ` ^
    case Character.DASH_PUNCTUATION:
        return true; // -
    case Character.MATH_SYMBOL:
        return true; // = ~ + | < >
    case Character.OTHER_PUNCTUATION:
        return true; // !@#%&*;':",./?
    case Character.START_PUNCTUATION:
        return true; // ( [ {
    case Character.END_PUNCTUATION:
        return true; // ) ] }
    }
    return false;
}

From source file:Main.java

public static boolean isRegistrationValid(String email) {

    if (email.length() != 11)
        return false;

    for (int i = 0; i < email.length(); i++) {
        if (i == 9) {
            if (email.charAt(i) != '-')
                return false;
        } else {/*from   w  w  w . ja  v  a2 s  .  c  o m*/
            if (!Character.isDigit(email.charAt(i)))
                return false;
        }
    }

    return true;
}

From source file:Main.java

private static String getNumericPrefix(String string) {
    StringBuffer numeric = new StringBuffer();

    if (string != null) {
        string = string.trim();/*  w ww  .  ja  va2s .com*/

        if (string.length() > 0) {

            StringBuffer buffer = new StringBuffer(string);
            char first = buffer.charAt(0);

            if (Character.isDigit(first)) {
                numeric.append(first);

                for (int i = 1; i < buffer.length(); i++) {
                    Character next = buffer.charAt(i);

                    if (Character.isDigit(next)) {
                        numeric.append(next);

                        // skip commas within numbers
                    } else if (next.equals(',')) {
                        continue;

                    } else {
                        break;
                    }
                }
            }
        }
    }

    return numeric.length() == 0 ? null : numeric.toString();
}