Example usage for java.lang String charAt

Introduction

In this page you can find the example usage for java.lang String charAt.

Prototype

public char charAt(int index)

Source Link

Document

Returns the char value at the specified index.

Usage

From source file:Main.java

public static String getHexString(String s) {
    StringBuilder sb = new StringBuilder();
    for (int i = 0; i < s.length(); i++) {
        char c = s.charAt(i);
        if (('0' <= c && c <= '9') || ('a' <= c && c <= 'f') || ('A' <= c && c <= 'F')) {
            sb.append(c);/*from   www  .java 2s . c  o m*/
        }
    }
    if ((sb.length() % 2) != 0) {
        sb.deleteCharAt(sb.length());
    }
    return sb.toString();
}

From source file:Main.java

/**
 * Returns the index of the first char of {@code chars} in {@code string}
 * bounded between {@code start} and {@code end}. This returns {@code end}
 * if none of the characters exist in the requested range.
 *///from ww w  .j a va 2s  . com
public static int findFirstOf(String string, String chars, int start, int end) {
    for (int i = start; i < end; i++) {
        char c = string.charAt(i);
        if (chars.indexOf(c) != -1) {
            return i;
        }
    }
    return end;
}

From source file:Main.java

public static boolean isToken(String tail) {
    if (tail == null || tail.length() == 0)
        return false;
    boolean result = isAlphabetic(tail.charAt(0));
    for (int i = 1; i < tail.length(); i++) {
        result = result && (isAlphabetic(tail.charAt(i)) || isDigit(tail.charAt(i)) || (tail.charAt(i) == '_')
                || (tail.charAt(i) == '[') || (tail.charAt(i) == ']'));
    }//w  w w.  j  a v  a2s  . c o m
    return result;
}

From source file:Main.java

/**
 * "Flattens" a phone number into a standard format by eliminating all symbols, etc.
 *///from w w w .  j  a va  2  s  .  c o m
public static String flattenPhone(String formattedPhone) {
    String flattened = PhoneNumberUtils.stripSeparators(formattedPhone);
    flattened = flattened.replaceAll("\\+", "");
    if (flattened.charAt(0) == '1')
        flattened = flattened.replaceFirst("1", "");
    return flattened;
}

From source file:Main.java

public static boolean isLegalName(String n) {
    if (n.length() == 0)
        return false;
    if (!Character.isLetter(n.charAt(0)))
        return false;
    for (int i = 0; i < n.length(); i++) {
        char c = n.charAt(i);
        if (Character.isLetterOrDigit(c))
            continue;
        if (c == '_')
            continue;
        if (c == '.')
            continue;
        return false;
    }//from w w  w .j  a  v a  2 s  .  co m
    if (n.length() > 1) {
        String n2 = n.substring(0, 2);
        if (n2.equalsIgnoreCase("JS"))
            return false;
    }
    if (n.indexOf("__") >= 0)
        return false;
    if (reservedWords.contains(n))
        return false;
    return true;
}

From source file:Main.java

public static int retiraId(String nome) {
    int id = -1;//from   w w w  . jav  a 2 s  . c  o  m
    String idTemp = "";
    for (int i = 0; i < nome.length(); i++) {
        if (nome.charAt(i) == '-') {
            break;
        }
        idTemp += nome.charAt(i);
    }
    id = Integer.parseInt(idTemp);
    return id;
}

From source file:Main.java

public static String xmlEncode(String str) {
    String ret = "";
    for (int i = 0; i < str.length(); i++) {
        char c = str.charAt(i);
        if (c >= 128 || c < 32) {
            ret += "&#" + (int) c + ";";
        } else/*  w ww.  ja  v  a 2 s .c o  m*/
            ret += c;
    }
    return ret;
}

From source file:Main.java

/**
 * Remove zero characters from string value passed to method
 * @param s = string value to remove zeros from
 * @return s with zero's removed// w  ww .  j  a v  a 2 s .  co  m
 */
public static String removeZeros(String s) {

    String r = "";
    char zero = '0';

    for (int i = 0; i < s.length(); i++) {
        if (s.charAt(i) != zero)
            r += s.charAt(i);
    }

    return r;
}

From source file:Main.java

private static String generateString(Random rng, String characters, int length) {
    char[] text = new char[length];
    for (int i = 0; i < length; i++) {
        text[i] = characters.charAt(rng.nextInt(characters.length()));
    }//from   w w  w . j  a v  a 2s .c o m
    return new String(text);
}

From source file:MainClass.java

public static String capitalize(String s) throws NullPointerException {
    if (s == null) {
        throw new NullPointerException("Your passed a null argument");
    }/*from w  w w.j av  a  2  s .c  o  m*/
    Character firstChar = s.charAt(0);
    String theRest = s.substring(1);
    return firstChar.toString().toUpperCase() + theRest;
}