Example usage for java.lang StringBuilder charAt

Introduction

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

Prototype

char charAt(int index);

Source Link

Document

Returns the char value at the specified index.

Usage

From source file:Main.java

/**
 * Converts a string to title casing./* w ww.ja  va2 s  . c  o m*/
 * @param str
 *      The string to convert.
 * @return
 *      The converted string.
 */
public static String toTitleCase(String str) {
    if (str == null) {
        return null;
    }
    // skip if already contains mixed case
    if (!str.equals(str.toLowerCase()) && !str.equals(str.toUpperCase())) {
        return str;
    }

    boolean isSeparator = true;
    StringBuilder builder = new StringBuilder(str);
    final int len = builder.length();

    for (int i = 0; i < len; ++i) {
        char c = builder.charAt(i);
        if (isSeparator) {
            if (Character.isLetterOrDigit(c)) {
                // Convert to title case and switch out of whitespace mode.
                builder.setCharAt(i, Character.toTitleCase(c));
                isSeparator = false;
            }
        } else if (!Character.isLetterOrDigit(c)) {
            isSeparator = true;
        } else {
            builder.setCharAt(i, Character.toLowerCase(c));
        }
    }

    return builder.toString();
}

From source file:Main.java

/**
 * Trim <i>all</i> whitespace from the given String:
 * leading, trailing, and in between characters.
 * @param str the String to check/*from w  w  w .  j a va 2  s.c  om*/
 * @return the trimmed String
 * @see java.lang.Character#isWhitespace
 */
public static String trimAllWhitespace(String str) {
    if (!hasLength(str)) {
        return str;
    }
    StringBuilder sb = new StringBuilder(str);
    int index = 0;
    while (sb.length() > index) {
        if (Character.isWhitespace(sb.charAt(index))) {
            sb.deleteCharAt(index);
        } else {
            index++;
        }
    }
    return sb.toString();
}

From source file:asia.gkc.vneedu.utils.FilterUtil.java

/**
 * ????//from  ww w. ja  v a  2  s  . c o  m
 * @param name - ????
 * @param prefix - ?,get/set
 * @param delimiter - ??
 * @return ??
 */
public static String getMethodName(String name, String prefix, String delimiter) {
    String[] parts = name.split(delimiter == null ? "_" : delimiter);
    StringBuilder sbOut = new StringBuilder(prefix == null ? "get" : prefix);

    if (parts.length >= 1) {
        for (String str : parts) {
            StringBuilder sb = new StringBuilder(str);
            sb.setCharAt(0, Character.toUpperCase(sb.charAt(0)));
            sbOut.append(sb);
        }
    }

    return new String(sbOut);
}

From source file:Main.java

/**
 * Converts a string to title casing.//from  w  w w. j a v a2s.c o m
 *
 * @param str The string to convert.
 * @return The converted string.
 */
public static String toTitleCase(String str) {
    if (str == null) {
        return null;
    }

    boolean isSeparator = true;
    StringBuilder builder = new StringBuilder(str);
    final int len = builder.length();

    for (int i = 0; i < len; ++i) {
        char c = builder.charAt(i);
        if (isSeparator) {
            if (Character.isLetterOrDigit(c)) {
                // Convert to title case and switch out of whitespace mode.
                builder.setCharAt(i, Character.toTitleCase(c));
                isSeparator = false;
            }
        } else if (!Character.isLetterOrDigit(c)) {
            isSeparator = true;
        } else {
            builder.setCharAt(i, Character.toLowerCase(c));
        }
    }

    return builder.toString();
}

From source file:org.commonjava.aprox.dotmaven.util.NameUtils.java

public static String appendPath(final String base, final String... parts) {
    final StringBuilder sb = new StringBuilder();
    sb.append(base);/*from   w  w w .j  av a  2s. c  om*/
    for (final String part : parts) {
        if (sb.charAt(sb.length() - 1) == '/') {
            sb.setLength(sb.length() - 1);
        }

        if (!part.startsWith("/")) {
            sb.append("/");
        }

        sb.append(part);
    }

    return sb.toString();
}

From source file:io.wcm.sling.commons.util.Escape.java

/**
 * Creates a valid node name. Replaces all chars not in a-z, A-Z and 0-9 or '_' with '-' and converts all to lowercase.
 * @param value String to be labelized./*w w w .j a va  2  s .  co  m*/
 * @return The labelized string.
 */
public static String validName(String value) {

    // convert to lowercase
    String text = value.toLowerCase();

    // replace some special chars first
    text = StringUtils.replace(text, "", "ae");
    text = StringUtils.replace(text, "", "oe");
    text = StringUtils.replace(text, "", "ue");
    text = StringUtils.replace(text, "", "ss");

    // replace all invalid chars
    StringBuilder sb = new StringBuilder(text);
    for (int i = 0; i < sb.length(); i++) {
        char ch = sb.charAt(i);
        if (!((ch >= 'A' && ch <= 'Z') || (ch >= 'a' && ch <= 'z') || (ch >= '0' && ch <= '9')
                || (ch == '_'))) {
            ch = '-';
            sb.setCharAt(i, ch);
        }
    }
    return sb.toString();
}

From source file:Main.java

public static String paramsmap2ParamsString(Map<String, String> params) {
    if (params == null)
        return "";
    StringBuilder sb = new StringBuilder();
    for (Map.Entry<String, String> param : params.entrySet()) {
        sb.append(param.getKey()).append("=").append(param.getValue()).append("&");
    }//from  ww w .  j  ava 2  s .c  om
    if (sb.charAt(sb.length() - 1) == '&')
        sb.deleteCharAt(sb.length() - 1);
    return sb.toString();
}

From source file:Main.java

public static String convertMaskedPhone(String phone) {
    StringBuilder phoneNumber = new StringBuilder(phone);
    for (int i = 0; i < phoneNumber.length(); i++) {
        switch (Character.toLowerCase(phoneNumber.charAt(i))) {
        case 'a':
        case 'b':
        case 'c':
            phoneNumber.setCharAt(i, '2');
            break;
        case 'd':
        case 'e':
        case 'f':
            phoneNumber.setCharAt(i, '3');
            break;
        case 'g':
        case 'h':
        case 'i':
            phoneNumber.setCharAt(i, '4');
            break;
        case 'j':
        case 'k':
        case 'l':
            phoneNumber.setCharAt(i, '5');
            break;
        case 'm':
        case 'n':
        case 'o':
            phoneNumber.setCharAt(i, '6');
            break;
        case 'p':
        case 'q':
        case 'r':
        case 's':
            phoneNumber.setCharAt(i, '7');
            break;
        case 't':
        case 'u':
        case 'v':
            phoneNumber.setCharAt(i, '8');
            break;
        case 'w':
        case 'x':
        case 'y':
        case 'z':
            phoneNumber.setCharAt(i, '9');
            break;
        case '+':
            phoneNumber.setCharAt(i, '0');
            break;
        }/*from  ww w.  ja  v  a2s  . co m*/
    }
    return phoneNumber.toString();
}

From source file:Main.java

public static String replaceEntities(String s) {
    StringBuilder sb = new StringBuilder(s);
    int len = s.length();
    int skip = 0;
    int iSkip = 0;
    for (int i = 0; i < len; i++) {
        iSkip = i + skip;/*from   ww w.j  a  v  a  2 s  . c o  m*/
        char c = sb.charAt(iSkip);
        if (c == '&') {
            sb.replace(iSkip, iSkip + 1, "&amp;");
            skip += 4;
        } else if (c == '\'') {
            sb.replace(iSkip, iSkip + 1, "&apos;");
            skip += 5;
        } else if (c == '<') {
            sb.replace(iSkip, iSkip + 1, "&lt;");
            skip += 3;
        } else if (c == '>') {
            sb.replace(iSkip, iSkip + 1, "&gt;");
            skip += 3;
        } else if (c == '"') {
            sb.replace(iSkip, iSkip + 1, "&quot;");
            skip += 5;
        }
    }
    return sb.toString();
}

From source file:Main.java

public static String formatValue(long value) throws NumberFormatException {
    if (value < 0) {
        throw new NumberFormatException("Negative value " + value);
    }/*from   w ww  .  j  a va2  s  .c  o  m*/
    StringBuilder sb = new StringBuilder(Long.toString(value));
    while (sb.length() <= 8) {
        sb.insert(0, '0');
    }
    sb.insert(sb.length() - 8, '.');
    while (sb.length() > 1 && (sb.charAt(sb.length() - 1) == '0' || sb.charAt(sb.length() - 1) == '.')) {
        sb.setLength(sb.length() - 1);
    }
    return sb.toString();
}