Word boundary break with BreakIterator

Description

Demo Code

import java.util.*;
import java.text.*;
import java.io.*;

public class BreakIteratorDemo {

    static void extractWords(String target, BreakIterator wordIterator) {

        wordIterator.setText(target);//  w w w  .ja v  a2s . co m
        int start = wordIterator.first();
        int end = wordIterator.next();

        while (end != BreakIterator.DONE) {
            String word = target.substring(start, end);
            if (Character.isLetterOrDigit(word.charAt(0))) {
                System.out.println(word);
            }
            start = end;
            end = wordIterator.next();
        }
    }

    static void reverseWords(String target, BreakIterator wordIterator) {

        wordIterator.setText(target);
        int end = wordIterator.last();
        int start = wordIterator.previous();

        while (start != BreakIterator.DONE) {
            String word = target.substring(start, end);
            if (Character.isLetterOrDigit(word.charAt(0)))
                System.out.println(word);
            end = start;
            start = wordIterator.previous();
        }
    }

    static void markBoundaries(String target, BreakIterator iterator) {

        StringBuffer markers = new StringBuffer();
        markers.setLength(target.length() + 1);
        for (int k = 0; k < markers.length(); k++) {
            markers.setCharAt(k, ' ');
        }

        iterator.setText(target);
        int boundary = iterator.first();

        while (boundary != BreakIterator.DONE) {
            markers.setCharAt(boundary, '^');
            boundary = iterator.next();
        }

        System.out.println(target);
        System.out.println(markers);
    }

    static void formatLines(String target, int maxLength,
            Locale currentLocale) {

        BreakIterator boundary = BreakIterator
                .getLineInstance(currentLocale);
        boundary.setText(target);
        int start = boundary.first();
        int end = boundary.next();
        int lineLength = 0;

        while (end != BreakIterator.DONE) {
            String word = target.substring(start, end);
            lineLength = lineLength + word.length();
            if (lineLength >= maxLength) {
                System.out.println();
                lineLength = word.length();
            }
            System.out.print(word);
            start = end;
            end = boundary.next();
        }
    }

    static void listPositions(String target, BreakIterator iterator) {

        iterator.setText(target);
        int boundary = iterator.first();

        while (boundary != BreakIterator.DONE) {
            System.out.println(boundary);
            boundary = iterator.next();
        }
    }

    static void characterExamples() {

        BreakIterator arCharIterator = BreakIterator
                .getCharacterInstance(new Locale("ar", "SA"));
        // Arabic word for "house"
        String house = "\u0628" + "\u064e" + "\u064a" + "\u0652" + "\u067a"
                + "\u064f";
        listPositions(house, arCharIterator);
    }

    static void wordExamples() {

        Locale currentLocale = new Locale("en", "US");
        BreakIterator wordIterator = BreakIterator
                .getWordInstance(currentLocale);
        String someText = "She stopped.  "
                + "She said, \"Hello there,\" and then went on.";
        markBoundaries(someText, wordIterator);
        System.out.println();
        extractWords(someText, wordIterator);
    }

    static void sentenceExamples() {

        Locale currentLocale = new Locale("en", "US");
        BreakIterator sentenceIterator = BreakIterator
                .getSentenceInstance(currentLocale);
        String someText = "She stopped.  "
                + "She said, \"Hello there,\" and then went on.";
        markBoundaries(someText, sentenceIterator);
        String variousText = "He's vanished!  "
                + "What will we do?  It's up to us.";
        markBoundaries(variousText, sentenceIterator);
        String decimalText = "Please add 1.5 liters to the tank.";
        markBoundaries(decimalText, sentenceIterator);
        String donneText = "\"No man is an island . . . "
                + "every man . . . \"";
        markBoundaries(donneText, sentenceIterator);
        String dogText = "My friend, Mr. Jones, has a new dog.  "
                + "The dog's name is Spot.";
        markBoundaries(dogText, sentenceIterator);
    }

    static void lineExamples() {

        Locale currentLocale = new Locale("en", "US");
        BreakIterator lineIterator = BreakIterator
                .getLineInstance(currentLocale);
        String someText = "She stopped.  "
                + "She said, \"Hello there,\" and then went on.";
        markBoundaries(someText, lineIterator);
        String hardHyphen = "There are twenty-four hours in a day.";
        markBoundaries(hardHyphen, lineIterator);
        System.out.println();
        String moreText = "She said, \"Hello there,\" and then "
                + "went on down the street.  When she stopped "
                + "to look at the fur coats in a shop window, "
                + "her dog growled.  \"Sorry Jake,\" she said. "
                + " \"I didn't know you would take it personally.\"";
        formatLines(moreText, 30, currentLocale);
        System.out.println();
    }

    static public void main(String[] args) {

        characterExamples();
        System.out.println();
        wordExamples();
        System.out.println();
        sentenceExamples();
        System.out.println();
        lineExamples();
    }

} // class

/*
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 *
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 * modification, are permitted provided that the following conditions
 * are met:
 *
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 *     notice, this list of conditions and the following disclaimer.
 *
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 *     notice, this list of conditions and the following disclaimer in the
 *     documentation and/or other materials provided with the distribution.
 *
 *   - Neither the name of Oracle or the names of its
 *     contributors may be used to endorse or promote products derived
 *     from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
 * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
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 */
Word boundary break with BreakIterator - Java 2D Graphics

Description

Demo Code

Result

Related Tutorials
