Example usage for java.lang CharSequence charAt

Introduction

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

Prototype

char charAt(int index);

Source Link

Document

Returns the char value at the specified index.

Usage

From source file:Main.java

private static int skipQuotedText(CharSequence s, int i, int len) {
    if (i + 1 < len && s.charAt(i + 1) == QUOTE) {
        return 2;
    }//from   w  w w. j a  v a2  s  .c  o  m

    int count = 1;
    // skip leading quote
    i++;

    while (i < len) {
        char c = s.charAt(i);

        if (c == QUOTE) {
            count++;
            // QUOTEQUOTE -> QUOTE
            if (i + 1 < len && s.charAt(i + 1) == QUOTE) {
                i++;
            } else {
                break;
            }
        } else {
            i++;
            count++;
        }
    }

    return count;
}

From source file:Main.java

public static long calculateWeiboLength(CharSequence c) {

    double len = 0;
    for (int i = 0; i < c.length(); i++) {
        int temp = (int) c.charAt(i);
        if (temp > 0 && temp < 127) {
            len += 0.5;/*  ww  w. j  a v  a  2  s.  co  m*/
        } else {
            len++;
        }
    }
    return Math.round(len);
}

From source file:Main.java

/**
 * Checks whether the character present at the index of the CharSequence is a flagged character.
 * @param text - input text.// ww  w .j a v a 2  s. com
 * @param index - index to check.
 * @return true if the character is flagged, false otherwise.
 */
public static boolean isFlagged(CharSequence text, int index) {
    if (index > INVALID_INDEX && index < text.length()) {
        char c = text.charAt(index);
        return c == SPACE || c == NEW_LINE || c == BOLD_FLAG || c == ITALIC_FLAG || c == STRIKE_FLAG;
    }
    return true;
}

From source file:Main.java

public static CharSequence getTrimmedString(CharSequence src) {
    if (src == null || src.length() == 0) {
        return src;
    }/*from  w  w w.j a  v  a2s  .  co m*/
    while (src.length() > 0 && (src.charAt(0) == '\n' || src.charAt(0) == ' ')) {
        src = src.subSequence(1, src.length());
    }
    while (src.length() > 0 && (src.charAt(src.length() - 1) == '\n' || src.charAt(src.length() - 1) == ' ')) {
        src = src.subSequence(0, src.length() - 1);
    }
    return src;
}

From source file:Main.java

public static String guessAppropriateEncoding(CharSequence contents) {
    // Very crude at the moment
    for (int i = 0; i < contents.length(); i++) {
        if (contents.charAt(i) > 0xFF) {
            return "UTF-8";
        }/*  w w w  . j a v  a2 s. co m*/
    }
    return null;
}

From source file:Main.java

private static void withinStyle(StringBuilder out, CharSequence text, int start, int end) {
    for (int i = start; i < end; i++) {
        char c = text.charAt(i);

        if (c == '<') {
            out.append("&lt;");
        } else if (c == '>') {
            out.append("&gt;");
        } else if (c == '&') {
            out.append("&amp;");
        } else if (c >= 0xD800 && c <= 0xDFFF) {
            if (c < 0xDC00 && i + 1 < end) {
                char d = text.charAt(i + 1);
                if (d >= 0xDC00 && d <= 0xDFFF) {
                    i++;/*from   w ww .j  ava2  s  .  co  m*/
                    int codePoint = 0x010000 | (int) c - 0xD800 << 10 | (int) d - 0xDC00;
                    out.append("&#").append(codePoint).append(";");
                }
            }
        } else if (c > 0x7E || c < ' ') {
            out.append("&#").append((int) c).append(";");
        } else if (c == ' ') {
            while (i + 1 < end && text.charAt(i + 1) == ' ') {
                out.append("&nbsp;");
                i++;
            }

            out.append(' ');
        } else {
            out.append(c);
        }
    }
}

From source file:Main.java

/** 
 * we can't store a password as a string, since in Java
 * strings are immutable, and thus we can't null out and
 * guarantee the password doesn't hang around after GC;
 * CharSequence doesn't have this problem, and that's what
 * an EditText returns; So, we go from CharSequence to
 * an array of bytes; We want a byte array anyway, for crypto.
 *
 *//*from  www . j  a v  a 2s .c o m*/
public static char[] fromCharSeqToChars(CharSequence seq) {
    char[] ret = new char[seq.length()];
    int i;

    for (i = 0; i < seq.length(); i++) {
        ret[i] = seq.charAt(i);
    }
    return ret;
}

From source file:Main.java

/**
 * Formats by adding forward slash every 2 numbers (IE like a credit card expiration date)
 * @param s Charsequence being altered.// w  w w .j  a  va2 s  . c o m
 * @return Return an altered String with hyphens in it
 */
public static String formatNumbersAsCreditCardExpiration(CharSequence s) {
    int groupDigits = 0;
    String tmp = "";
    for (int i = 0; i < s.length(); ++i) {
        tmp += s.charAt(i);
        ++groupDigits;
        if (groupDigits == 2) {
            tmp += "/";
            groupDigits = 0;
        }
    }
    if (tmp.length() > 5) {
        tmp = tmp.substring(0, tmp.length() - 1); //Get rid of last digit
    }
    return tmp;
}

From source file:Main.java

public static boolean isValidT9Key(@NonNull CharSequence key) {
    final int LEN = key.length();
    for (int i = 0; i < LEN; i++) {
        if (!isValidT9Key(key.charAt(i))) {
            return false;
        }/*from  ww  w. ja va  2 s  . c  o m*/
    }
    return true;
}

From source file:Main.java

public static String sanitizeToLineFeed(CharSequence string) {
    StringBuilder sb = new StringBuilder();
    for (int i = 0, len = string.length(); i < len; i++) {
        char c = string.charAt(i);
        boolean legal = c == '\u0009' || c == '\n' || (c >= '\u0020' && c <= '\uD7FF')
                || (c >= '\uE000' && c <= '\uFFFD');
        if (legal) {
            sb.append(c);//w ww .  j a  va  2  s.com
        }
    }
    return sb.toString();
}