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 int stringToInteger(String inString, int inStart) {
    int result = 0;
    char letter = inString.charAt(inStart);
    boolean negate = false;

    if (letter == '-') {
        inStart += 1;/*  www  . ja va2  s .c  om*/
        negate = true;
    } else if (letter == '+') {
        inStart += 1;
    }

    result = stringToUnsigned(inString, inStart);

    return negate ? -result : result;
}

From source file:Main.java

public static String convertPhoneNumberTo8Format(String text) {
    try {//from  w  w w.  ja v a 2 s .c  om
        text = text.trim();
        if (text.charAt(0) == '+') {
            text = text.substring(1);
        }
        if (text.charAt(0) == '7') {
            StringBuilder strBuilder = new StringBuilder(text);
            strBuilder.setCharAt(0, '8');
            text = strBuilder.toString();
        }
        BigInteger dummy = new BigInteger(text);
        if (text.charAt(0) != '8' || text.length() != 11) {
            throw new Exception();
        }
    } catch (Throwable t) {
        text = "";
        //LOGE("convertPhoneNumberTo8Format: " + t.getMessage());
        t.printStackTrace();
    }

    return text;
}

From source file:Main.java

protected static boolean validType(String str) {
    for (int count = 0; count < str.length(); count++) {
        char ch = str.charAt(count);
        if (validStr.indexOf(ch) == -1) {
            return false;
        }//www .j av  a2  s .  c o m
    }
    return true;
}

From source file:Main.java

public static Color readColorAttr(Element element, String attributeName, Color defaultValue) {
    String s = element.getAttribute(attributeName);

    if (s == null || s.charAt(0) != '#') {
        return defaultValue;
    }//  w ww .  j a  va 2 s. c  o  m

    try {
        return new Color(Integer.parseInt(s.substring(1), 16), false);
    } catch (NumberFormatException e) {
        e.printStackTrace();
        return defaultValue;
    }
}

From source file:Main.java

public static String randomString(int len, String charset) {
    String out = "";

    for (int i = 0; i < len; i++) {
        out += charset.charAt((int) (Math.random() * charset.length()));
    }/* ww  w  . j  a va2s  .c  om*/

    return out;
}

From source file:Main.java

/**
 * right trime character//from ww  w.  j  av  a2 s  .  c  om
 * @param p_str
 * @param p_match trim out this pattern
 * @return
 */
public static String rtrim(String p_str, char p_match) {
    int i = p_str.length();
    for (; i > 0; i--)
        if (p_str.charAt(i - 1) != p_match)
            break;

    return p_str.substring(0, i);
}

From source file:Main.java

/**
 * Replaces instances of Emoji unicode characters with their Emoji-Cheat sheet key
 *
 * @param s/*from  ww w  .  j  a  v  a  2s  .c om*/
 * @return
 */
public static String replaceUnicodeEmojis(String s) {
    if (TextUtils.isEmpty(s)) {
        return "";
    }
    for (int i = 0; i < s.length(); i++) {
        String key = s.substring(i, i + 1);
        if ((Character.isLowSurrogate(key.charAt(0)) || Character.isHighSurrogate(key.charAt(0)))
                && s.length() > i + 1) {
            key = s.substring(i, i + 2);
        }
        String emoji = UNICODE_TO_CHEAT_SHEET.get(key);
        if (null != emoji) {
            s = s.replace(key, emoji);
        }
    }
    return s;
}

From source file:Main.java

public static String toHexString(String s) {
    String str = "";

    for (int i = 0; i < s.length(); ++i) {
        char ch = s.charAt(i);
        String s4 = Integer.toHexString(ch);
        str = str + s4;//from  w  w  w . j a va2 s.c o m
    }

    return str;
}

From source file:Main.java

public static String validateAndFixUserPhoneNumber(String text) {
    try {/*from  ww w .j  a v  a 2 s  .com*/
        text = text.trim();
        if (text.charAt(0) == '+') {
            text = text.substring(1);
        }
        BigInteger dummy = new BigInteger(text);
        if (text.charAt(0) == '8') {
            StringBuilder strBuilder = new StringBuilder(text);
            strBuilder.setCharAt(0, '7');
            text = strBuilder.toString();
        }
        if (text.charAt(0) != '7' || text.length() != 11) {
            throw new Exception();
        }
        text = "+" + text;
    } catch (Throwable t) {
        text = "";
        //LOGE("validateAndFixUserPhoneNumber: " + t.getMessage());
        t.printStackTrace();
    }

    return text;
}

From source file:Main.java

public static String toHexString(String s) {
    String str = "";
    for (int i = 0; i < s.length(); i++) {
        int ch = (int) s.charAt(i);
        String s4 = Integer.toHexString(ch);
        str = str + s4;//from  www.ja v  a2s.  c  o m
    }
    return str;
}