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 toUpperString(String s) {
    int idx = 0;/*from w  w  w .  j  a  va2 s.co  m*/
    for (; idx < s.length(); idx++) {
        char c = s.charAt(idx);
        if (c >= 'a' && c <= 'z') {
            break;
        }
    }
    if (idx == s.length()) {
        return s;
    }
    StringBuilder buf = new StringBuilder(s.substring(0, idx));
    for (; idx < s.length(); idx++) {
        buf.append(toUpper(s.charAt(idx)));
    }
    return buf.toString();
}

From source file:Main.java

private static String substring(String s, int beginIndex, int endIndex) {
    while (beginIndex < endIndex && s.charAt(beginIndex) <= ' ')
        beginIndex++;//from ww  w .jav  a  2s.  co  m
    while (beginIndex < endIndex && s.charAt(endIndex - 1) <= ' ')
        endIndex--;
    return beginIndex < endIndex ? s.substring(beginIndex, endIndex) : "";
}

From source file:Main.java

public static Integer[] getDigits(String number) {
    List<Integer> digits = new ArrayList<Integer>();
    for (int i = 0; i < number.length(); i++) {
        int j = Character.digit(number.charAt(i), 10);
        digits.add(j);//from w w  w . ja  v a 2 s  .co  m
    }
    return digits.toArray(new Integer[] {});
}

From source file:Main.java

public static int oneByOneHash(String key) {
    int hash, i;/*from   w w w.j a v a2  s.c  o m*/
    for (hash = 0, i = 0; i < key.length(); ++i) {
        hash += key.charAt(i);
        hash += (hash << 10);
        hash ^= (hash >> 6);
    }
    hash += (hash << 3);
    hash ^= (hash >> 11);
    hash += (hash << 15);
    // return (hash & M_MASK);
    return hash;
}

From source file:Main.java

public static byte[] UdpHexDecode(String s) {
    byte abyte0[] = new byte[s.length() / 2];
    String s1 = s.toLowerCase();
    for (int i = 0; i < s1.length(); i += 2) {
        char c = s1.charAt(i);
        char c1 = s1.charAt(i + 1);
        int j = i / 2;
        if (c < 'a')
            abyte0[j] = (byte) (c - 48 << 4);
        else/*from  ww w.j a  v a  2  s. c o m*/
            abyte0[j] = (byte) ((c - 97) + 10 << 4);
        if (c1 < 'a')
            abyte0[j] += (byte) (c1 - 48);
        else
            abyte0[j] += (byte) ((c1 - 97) + 10);
    }
    return abyte0;
}

From source file:Main.java

public static Boolean _isItReadable(String input) {
    int readableChar = 0;
    for (int i = 0; i < input.length(); i++) {
        int c = input.charAt(i);
        if (c >= 32 && c < 127) {
            readableChar++;/*w w  w  .  j av  a 2 s  .  c  o m*/
        }
    }
    return (readableChar > (input.length() * 0.75) ? true : false);
}

From source file:Main.java

public static String toLowerString(String s) {
    int idx = 0;//from  ww w .  j  a va 2s .co  m
    for (; idx < s.length(); idx++) {
        char c = s.charAt(idx);
        if (c >= 'A' && c <= 'Z') {
            break;
        }
    }
    if (idx == s.length()) {
        return s;
    }
    StringBuilder buf = new StringBuilder(s.substring(0, idx));
    for (; idx < s.length(); idx++) {
        buf.append(toLower(s.charAt(idx)));
    }
    return buf.toString();
}

From source file:Main.java

/**
 * Normalizes the phone number format./* w  ww.  j av  a2  s. c o m*/
 * 
 * @param number the input phone number.
 * @return a normalized phone number.
 */
public static String normalizePhone(String number) {
    if (number != null && number.length() > 0) {
        if (number.charAt(0) == '+') {
            number = "+" + number.substring(1).replaceAll("[^\\d]", "");

            return number;
        } else {
            number = number.replaceAll("[^\\d]", "");

            if (number.length() == 10)
                return "+1" + number;
            else if (number.length() == 11 && number.charAt(0) == '1')
                return "+" + number;
            else if (number.length() > 10)
                return "+" + number;
            else
                return "+1" + number;
        }
    } else {
        return "+1";
    }
}

From source file:Main.java

public static boolean isQuotedString(String string) {
    if (TextUtils.isEmpty(string))
        return false;

    if (string.length() >= 2 && string.charAt(0) == '"' && string.charAt(string.length() - 1) == '"')
        return true;
    return false;
}

From source file:Main.java

public static boolean isLetterBegin(String s) {
    if (TextUtils.isEmpty(s))
        return false;
    else {//w w w  . j a  v  a2  s . c  o  m
        char c = s.charAt(0);
        int i = (int) c;
        if ((i >= 65 && i <= 90) || (i >= 97 && i <= 122)) {
            return true;
        } else {
            return false;
        }
    }
}