Example usage for java.text CharacterIterator previous

Introduction

In this page you can find the example usage for java.text CharacterIterator previous.

Prototype

public char previous();

Source Link

Document

Decrements the iterator's index by one and returns the character at the new index.

Usage

From source file:Main.java

public static void main(String[] args) {
    CharacterIterator it = new StringCharacterIterator(text);

    for (char ch = it.last(); ch != CharacterIterator.DONE; ch = it.previous()) {
        System.out.print(ch);/* ww  w.jav a2  s  . c om*/
    }
}

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From source file:Main.java

public static void main(String[] argv) throws Exception {
    CharacterIterator it = new StringCharacterIterator("abcd");

    for (char ch = it.last(); ch != CharacterIterator.DONE; ch = it.previous()) {
        System.out.println(ch);//w w  w  .j  ava  2s.  c o m
    }
}

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From source file:Main.java

public static void main(String[] argv) throws Exception {
    CharacterIterator it = new StringCharacterIterator("abcd");

    char ch = it.first();
    ch = it.current();/*w ww .ja v  a  2s .  c  om*/
    ch = it.next();
    ch = it.current();
    ch = it.last();
    int pos = it.getIndex();
    ch = it.next();
    pos = it.getIndex();
    ch = it.previous();
    ch = it.setIndex(1);
}

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From source file:com.woonoz.proxy.servlet.UrlRewriterImpl.java

private static String removeTrailingSlashes(final String text) {
    if (text.isEmpty()) {
        return text;
    }//  www.j  ava2s .com
    final CharacterIterator it = new StringCharacterIterator(text);
    Character c = it.last();
    while (c.equals('/')) {
        c = it.previous();
    }
    return text.substring(0, it.getIndex() + 1);
}

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From source file:org.apache.arrow.vector.util.Text.java

/**
 * For the given string, returns the number of UTF-8 bytes required to encode the string.
 *
 * @param string//from  w ww  . ja va2s  .  com
 *          text to encode
 * @return number of UTF-8 bytes required to encode
 */
public static int utf8Length(String string) {
    CharacterIterator iter = new StringCharacterIterator(string);
    char ch = iter.first();
    int size = 0;
    while (ch != CharacterIterator.DONE) {
        if ((ch >= 0xD800) && (ch < 0xDC00)) {
            // surrogate pair?
            char trail = iter.next();
            if ((trail > 0xDBFF) && (trail < 0xE000)) {
                // valid pair
                size += 4;
            } else {
                // invalid pair
                size += 3;
                iter.previous(); // rewind one
            }
        } else if (ch < 0x80) {
            size++;
        } else if (ch < 0x800) {
            size += 2;
        } else {
            // ch < 0x10000, that is, the largest char value
            size += 3;
        }
        ch = iter.next();
    }
    return size;
}

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From source file:net.issarlk.androbunny.inkbunny.API.java

public static String extractTree(Pattern pattern, String data) {
    Matcher matches = pattern.matcher(data);
    if (matches.matches()) {
        data = matches.group(1);//  w  w  w . j  a v  a2  s .  c  o m
        StringBuilder result = new StringBuilder();
        //Extract
        int taglevel = 0;

        CharacterIterator it = new StringCharacterIterator(data);
        int mode = 0;
        int inparamname = 0;
        int inparamvalue = 0;
        int outsidetags = 0;
        int intagname = 0;
        char paramvaluechar = '"';
        HashMap<String, String> params = new HashMap<String, String>();
        StringBuilder tagname = new StringBuilder();
        StringBuilder paramname = new StringBuilder();
        StringBuilder paramvalue = new StringBuilder();
        StringBuilder text = new StringBuilder();
        for (char c = it.first(); c != CharacterIterator.DONE; c = it.next()) {

            if (c == '<') {
                //start of tag
                c = it.next();
                params.clear();
                outsidetags = 0;
                //Output text
                //Log.d(TAG, repeat(' ', taglevel) + text.toString());
                result.append(text);
                if (c == '/') {
                    //Start of closing tag
                    mode = 3;
                    intagname = 1;
                    c = it.next();
                } else {
                    //Start of openning tag
                    mode = 2;
                    intagname = 1;
                }
                tagname = new StringBuilder();
            }
            if (intagname == 1) {
                if (c < 'a' || c > 'z') {
                    intagname = 0;
                } else {
                    tagname.append(c);
                }
            }
            if ((mode == 2 || mode == 3) && intagname == 0 && inparamname == 0 && inparamvalue == 0 && c >= 'a'
                    && c <= 'z') {
                inparamname = 1;
                paramname = new StringBuilder();
            }
            if (inparamname == 1) {
                if (c == '=') {
                    inparamname = 0;
                    inparamvalue = 1;
                    paramvaluechar = it.next();
                    paramvalue = new StringBuilder();
                    continue;
                } else if (c != ' ') {
                    paramname.append(c);
                }
            }
            if (inparamvalue == 1) {
                if (c == paramvaluechar) {
                    //End of value
                    inparamvalue = 0;
                    params.put(paramname.toString(), paramvalue.toString());
                } else {
                    paramvalue.append(c);
                }
            }
            if (mode == 2 && inparamvalue == 0 && c == '/') {
                c = it.next();
                if (c == '>') {
                    //tag closed at its end
                    mode = 4;
                    if (tagname.toString().equals("br")) {
                        result.append("<br/>");
                    }
                } else {
                    c = it.previous();
                }
            }
            if (c == '>') {
                if (mode == 2) {
                    //openning
                    taglevel += 1;
                    outsidetags = 1;
                    text = new StringBuilder();
                    String paramstr = "";
                    for (String key : params.keySet()) {
                        paramstr += " " + key + "=\"" + params.get(key) + "\"";
                    }
                    //Log.d(TAG, repeat(' ', taglevel - 1) + "<" + tagname.toString() + paramstr + ">");
                    result.append("<" + tagname.toString() + paramstr + ">");
                    mode = 0;
                    continue;
                } else if (mode == 3) {
                    //Closing
                    taglevel -= 1;
                    outsidetags = 1;
                    text = new StringBuilder();
                    //Log.d(TAG, repeat(' ', taglevel) + "</" + tagname.toString() + ">");
                    result.append("</" + tagname.toString() + ">\n");
                    mode = 0;
                    if (taglevel <= 0) {
                        break;
                    }
                    continue;
                } else if (mode == 4) {
                    //closed at end
                    outsidetags = 1;
                    text = new StringBuilder();
                    //Log.d(TAG, repeat(' ', taglevel) + "<" + tagname.toString() + "/>");
                    result.append("<" + tagname.toString() + "/>\n");
                    mode = 0;
                    continue;
                }
            }
            if (outsidetags == 1) {
                //Append char
                text.append(c);
            }
        }

        String res = result.toString();
        return res;
    }
    return null;
}

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