Example usage for java.lang Character isLetter

Introduction

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

Prototype

public static boolean isLetter(int codePoint)

Source Link

Document

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

Usage

From source file:Classify.java

public static void main(String[] args) throws java.io.IOException {
    char c = '\u0beb'; // Tamil digit.

    System.out.println("Character = " + (int) c);
    System.out.println("Defined = " + Character.isDefined(c));
    System.out.println("Digit = " + Character.isDigit(c));
    System.out.println("Ignorable = " + Character.isIdentifierIgnorable(c));
    System.out.println("ISO control = " + Character.isISOControl(c));
    System.out.println("Java identifier part = " + Character.isJavaIdentifierPart(c));
    System.out.println("Java identifier start = " + Character.isJavaIdentifierStart(c));
    System.out.println("Letter = " + Character.isLetter(c));
    System.out.println("Letter or digit = " + Character.isLetterOrDigit(c));
    System.out.println("Lowercase = " + Character.isLowerCase(c));
    System.out.println("Space = " + Character.isSpaceChar(c));
    System.out.println("Titlecase = " + Character.isTitleCase(c));
    System.out.println("Unicode identifier part = " + Character.isUnicodeIdentifierPart(c));
    System.out.println("Unicode identifier start = " + Character.isUnicodeIdentifierStart(c));
    System.out.println("Uppercase = " + Character.isUpperCase(c));
    System.out.println("White space = " + Character.isWhitespace(c));

    byte[] types = { Character.COMBINING_SPACING_MARK, Character.CONNECTOR_PUNCTUATION, Character.CONTROL,
            Character.CURRENCY_SYMBOL, Character.DASH_PUNCTUATION, Character.DECIMAL_DIGIT_NUMBER,
            Character.ENCLOSING_MARK, Character.END_PUNCTUATION, Character.FORMAT, Character.LETTER_NUMBER,
            Character.LINE_SEPARATOR, Character.LOWERCASE_LETTER, Character.MATH_SYMBOL,
            Character.MODIFIER_SYMBOL, Character.NON_SPACING_MARK, Character.OTHER_LETTER,
            Character.OTHER_NUMBER, Character.OTHER_PUNCTUATION, Character.OTHER_SYMBOL,
            Character.PARAGRAPH_SEPARATOR, Character.PRIVATE_USE, Character.SPACE_SEPARATOR,
            Character.START_PUNCTUATION, Character.SURROGATE, Character.TITLECASE_LETTER, Character.UNASSIGNED,
            Character.UPPERCASE_LETTER };

    String[] typeNames = { "Combining spacing mark", "Connector punctuation", "Control", "Currency symbol",
            "Dash punctuation", "Decimal digit number", "Enclosing mark", "End punctuation", "Format",
            "Letter number", "Line separator", "Lowercase letter", "Math symbol", "Modifier symbol",
            "Non spacing mark", "Other letter", "Other number", "Other punctuation", "Other symbol",
            "Paragraph separator", "Private use", "Space separator", "Start punctuation", "Surrogate",
            "Titlecase letter", "Unassigned", "Uppercase letter" };

    int type = Character.getType(c);

    for (int i = 0; i < types.length; i++)
        if (type == types[i]) {
            System.out.println("Type name = " + typeNames[i]);
            break;
        }/* w w  w  . jav a2 s . c  om*/

    System.out.println("Unicode block = " + Character.UnicodeBlock.of(c));
}

From source file:Main.java

public static void main(String[] args) {
    // Using the constructor
    Character c1 = new Character('A');

    // Using the factory method - preferred
    Character c2 = Character.valueOf('2');
    Character c3 = Character.valueOf('-');

    // Getting the wrapped char values
    char cc1 = c1.charValue();
    char cc2 = c2.charValue();
    char cc3 = c3.charValue();

    System.out.println("c1 = " + c1);
    System.out.println("c2 = " + c2);
    System.out.println("c3 = " + c3);

    // Using some Character class methods on c1
    System.out.println("isLowerCase c1    = " + Character.isLowerCase(cc1));
    System.out.println("isDigit c1    = " + Character.isDigit(cc1));
    System.out.println("isLetter c1    = " + Character.isLetter(cc1));
    System.out.println("Lowercase of  c1    = " + Character.toLowerCase(cc1));

    // Using some Character class methods on c2
    System.out.println("isLowerCase c2    = " + Character.isLowerCase(cc2));
    System.out.println("isDigit c2    = " + Character.isDigit(cc2));
    System.out.println("isLetter c2    = " + Character.isLetter(cc2));
    System.out.println("Lowercase of  c2    = " + Character.toLowerCase(cc2));

    System.out.println("Uppercase of  c3    = " + Character.toUpperCase(cc3));

}

From source file:Main.java

public static final boolean isXMLNameChar(char c) {
    return Character.isLetter(c) || Character.isDigit(c) || c == '.' || c == '-' || c == '_' || c == ':';
}

From source file:Main.java

public static boolean isChar(String content) {
    char c = content.charAt(0);

    return Character.isLetter(c);

}

From source file:Main.java

public static boolean isExistLetter(String str) {
    for (Character c : str.toCharArray()) {
        if (Character.isLetter(c)) {
            return true;
        }//from   ww  w .  j  a v  a  2  s  . c  om
    }
    return false;
}

From source file:Main.java

public static boolean isAlpha(String name) {
    char[] chars = name.toCharArray();

    for (char c : chars) {
        if (!Character.isLetter(c)) {
            return false;
        }// ww  w. j  av  a  2  s  .  c  o m
    }

    return true;
}

From source file:Main.java

public static boolean isAlpha(String name) {
    char[] chars = name.toCharArray();

    for (char c : chars) {
        if (!Character.isLetter(c)) {
            if (!Character.isWhitespace(c)) {
                return false;
            }/*w  w  w  .ja v  a2 s  .c  o  m*/
        }
    }
    return true;
}

From source file:Main.java

public static boolean containsLetters(String original) {

    char[] chars = original.toCharArray();

    for (char c : chars) {
        if (Character.isLetter(c)) {
            return true;
        }/* ww w . j a  v a  2  s . co  m*/
    }
    return false;
}

From source file:Main.java

public static boolean isExistSpecialSymbols(String str) {
    for (Character c : str.toCharArray()) {
        if (!Character.isDigit(c)) {
            if (!Character.isLetter(c)) {
                return true;
            }/*from   w  w w .jav  a 2s  . com*/
        }
    }
    return false;
}

From source file:Main.java

public static String capitalizeFirstLetter(String str) {
    if (isEmpty(str)) {
        return str;
    }//  w w  w.  j  a  v  a  2s  .  c om

    char c = str.charAt(0);
    return (!Character.isLetter(c) || Character.isUpperCase(c)) ? str
            : new StringBuilder(str.length()).append(Character.toUpperCase(c)).append(str.substring(1))
                    .toString();
}