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:corner.orm.tapestry.service.captcha.RandomUtil.java

/**
 * ???// w  w w.jav  a  2 s  . c  o  m
 * @param string 
 * @return ?
 */
public static String encodeStr(String string) {
    String str = DigestUtils.md5Hex(string);
    StringBuffer sb = new StringBuffer();
    sb.append(str.charAt(7));
    sb.append(str.charAt(15));
    sb.append(str.charAt(23));
    sb.append(str.charAt(31));
    return sb.toString();
}

From source file:Main.java

public static boolean isFirstUpperCase(String target) throws NullPointerException {
    if (target == null)
        throw new NullPointerException();
    final char c = target.charAt(0);
    for (int i = 0, size = UpperCases.length; i < size; i++) {
        if (UpperCases[i] == c) {
            return true;
        }//from www . jav  a  2 s.  c om
    }
    return false;
}

From source file:Main.java

public static int skipLeadingAsciiWhitespace(String input, int pos, int limit) {
    for (int i = pos; i < limit; i++) {
        switch (input.charAt(i)) {
        case '\t':
        case '\n':
        case '\f':
        case '\r':
        case ' ':
            continue;
        default:/*w  ww  .  j a v  a2  s .  c  om*/
            return i;
        }
    }
    return limit;
}

From source file:Main.java

public static int ELFHash(String str) {
    int hash = 0;
    int x = 0;/*from w  w  w.  j a v a 2  s .  c  om*/

    for (int i = 0; i < str.length(); i++) {
        hash = (hash << 4) + str.charAt(i);
        if ((x = (int) (hash & 0xF0000000L)) != 0) {
            hash ^= (x >> 24);
            hash &= ~x;
        }
    }

    return (hash & 0x7FFFFFFF);
}

From source file:Main.java

public static String getShadowStyleVersionNumber(String peer_id) {
    String ver_number = decodeAlphaNumericChar(peer_id.charAt(1));
    if (ver_number == null) {
        return null;
    }//  w  ww  .  j  a v a  2s.  c  om
    for (int i = 2; i < 6 && ver_number != null; i++) {
        char c = peer_id.charAt(i);
        if (c == '-') {
            break;
        }
        ver_number = joinAsDotted(ver_number, decodeAlphaNumericChar(peer_id.charAt(i)));
        if (ver_number == null) {
            return (null);
        }
    }
    // We'll strip off trailing redundant zeroes.
    while (ver_number.endsWith(".0")) {
        ver_number = ver_number.substring(0, ver_number.length() - 2);
    }
    return ver_number;
}

From source file:Main.java

/**
 * Return PITarget from Processing Instruction (PI) as defined in XML 1.0 Section 2.6 Processing Instructions <code>[16] PI ::= '&lt;?' PITarget (S (Char* - (Char* '?>' Char*)))? '?>'</code>
 */// w  w  w  .  j  a  v a  2 s  .c o m
public static String getPITarget(final XmlPullParser pp) throws IllegalStateException {
    int eventType;

    try {
        eventType = pp.getEventType();
    } catch (final XmlPullParserException x) {
        // should never happen ...
        throw new IllegalStateException("could not determine parser state: " + x + pp.getPositionDescription());
    }

    if (eventType != XmlPullParser.PROCESSING_INSTRUCTION)
        throw new IllegalStateException("parser must be on processing instruction and not "
                + XmlPullParser.TYPES[eventType] + pp.getPositionDescription());

    final String PI = pp.getText();
    for (int i = 0; i < PI.length(); i++) {
        if (isS(PI.charAt(i))) {
            // assert i > 0
            return PI.substring(0, i);
        }
    }

    return PI;
}

From source file:Main.java

public static String formatPhone(String number) {
    StringBuffer sb = new StringBuffer();
    char c;//w w  w.ja v  a  2  s.  c  om
    for (int i = 0; i < number.length(); i++) {
        c = number.charAt(i);
        if (48 <= c && c <= 57)
            sb.append(c);
    }
    return sb.toString();
}

From source file:Main.java

public static String removeDoubleQuotes(String string) {
    if (TextUtils.isEmpty(string))
        return "";
    int length = string.length();
    if ((length > 1) && (string.charAt(0) == '"') && (string.charAt(length - 1) == '"')) {
        return string.substring(1, length - 1);
    }/*from   w  w  w  .  ja v  a 2  s  . co m*/
    return string;
}

From source file:Main.java

public static String compact(String s) {
    char[] cs = new char[s.length()];
    int len = 0;/*from ww  w .j a  v a2  s  .c  o  m*/
    for (int n = 0; n < cs.length; n++) {
        char c = s.charAt(n);
        if (c == ' ' || c == '\t' || c == '\r' || c == '\n' || c == CHAR_CHINESE_SPACE)
            continue;
        cs[len] = c;
        len++;
    }
    return new String(cs, 0, len);
}

From source file:Main.java

private static void appendAttributeValue(StringBuilder builder, String value) {
    int n = value.length();
    for (int i = 0; i < n; i++) {
        char c = value.charAt(i);
        switch (c) {
        case '<':
            builder.append("&lt;");
            break;
        case '>':
            builder.append("&gt;");
            break;
        case '&':
            builder.append("&amp;");
            break;
        default://from   w w w .j  a  va 2 s . c o m
            builder.append(c);
            break;
        }
    }
}