Java/Development Class/Char Text

Break Iterator Demo

/* From http://java.sun.ru/docs/books/tutorial/index.html */
/*
 * Copyright (c) 1995-1998 Sun Microsystems, Inc. All Rights Reserved.
 * 
 * Permission to use, copy, modify, and distribute this software and its
 * documentation for NON-COMMERCIAL purposes and without fee is hereby granted
 * provided that this copyright notice appears in all copies. Please refer to
 * the file "copyright.html" for further important copyright and licensing
 * information.
 * 
 * SUN MAKES NO REPRESENTATIONS OR WARRANTIES ABOUT THE SUITABILITY OF THE
 * SOFTWARE, EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR
 * NON-INFRINGEMENT. SUN SHALL NOT BE LIABLE FOR ANY DAMAGES SUFFERED BY
 * LICENSEE AS A RESULT OF USING, MODIFYING OR DISTRIBUTING THIS SOFTWARE OR ITS
 * DERIVATIVES.
 */
import java.text.BreakIterator;
import java.util.Locale;
public class BreakIteratorDemo {
  static void extractWords(String target, BreakIterator wordIterator) {
    wordIterator.setText(target);
    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

Capitalizing each word in a sentence with loop

public class Main {
  public static void main(String[] a) {
    String sentence = "this is a test";
    String tmp = "";
    String[] words = sentence.split(" ");
    for (int i = 0; i < words.length; i++) {
      tmp += words[i].substring(0, 1).toUpperCase();
      tmp += words[i].substring(1).toLowerCase();
      tmp += " ";
    }
    System.out.println(tmp.trim()); 
    
  }
}

Capitalizing each word in a sentence with recursive function

   
public class Main {
  public static void main(String[] args) {
    String sentence = "this is a test";
    System.out.println(capSentence(sentence, true));
  }
  public static String capSentence(String string, boolean capitalize) {
    if (string.length() == 0) {
      return "";
    }
    String c = string.substring(0, 1);
    if (capitalize) {
      return c.toUpperCase() + capSentence(string.substring(1), c.equals(" "));
    } else {
      return c.toLowerCase() + capSentence(string.substring(1), c.equals(" "));
    }
  }
}

Character Demo

/*
 * Copyright (c) 2006 Sun Microsystems, Inc. All Rights Reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * -Redistribution of source code must retain the above copyright notice, this
 *  list of conditions and the following disclaimer.
 *
 * -Redistribution in binary form must reproduce the above copyright notice,
 *  this list of conditions and the following disclaimer in the documentation
 *  and/or other materials provided with the distribution.
 *
 * Neither the name of Sun Microsystems, Inc. or the names of contributors may
 * be used to endorse or promote products derived from this software without
 * specific prior written permission.
 *
 * This software is provided "AS IS," without a warranty of any kind. ALL
 * EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES, INCLUDING
 * ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE
 * OR NON-INFRINGEMENT, ARE HEREBY EXCLUDED. SUN MIDROSYSTEMS, INC. ("SUN")
 * AND ITS LICENSORS SHALL NOT BE LIABLE FOR ANY DAMAGES SUFFERED BY LICENSEE
 * AS A RESULT OF USING, MODIFYING OR DISTRIBUTING THIS SOFTWARE OR ITS
 * DERIVATIVES. IN NO EVENT WILL SUN OR ITS LICENSORS BE LIABLE FOR ANY LOST
 * REVENUE, PROFIT OR DATA, OR FOR DIRECT, INDIRECT, SPECIAL, CONSEQUENTIAL,
 * INCIDENTAL OR PUNITIVE DAMAGES, HOWEVER CAUSED AND REGARDLESS OF THE THEORY
 * OF LIABILITY, ARISING OUT OF THE USE OF OR INABILITY TO USE THIS SOFTWARE,
 * EVEN IF SUN HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
 *
 * You acknowledge that this software is not designed, licensed or intended
 * for use in the design, construction, operation or maintenance of any
 * nuclear facility.
 */
public class CharacterDemo {
  public static void main(String args[]) {
    Character a = new Character("a");
    Character a2 = new Character("a");
    Character b = new Character("b");
    int difference = a.rupareTo(b);
    if (difference == 0) {
      System.out.println("a is equal to b.");
    } else if (difference < 0) {
      System.out.println("a is less than b.");
    } else if (difference > 0) {
      System.out.println("a is greater than b.");
    }
    System.out.println("a is " + ((a.equals(a2)) ? "equal" : "not equal")
        + " to a2.");
    System.out.println("The character " + a.toString() + " is "
        + (Character.isUpperCase(a.charValue()) ? "upper" : "lower")
        + "case.");
  }
}

Keys Demo

/* From http://java.sun.ru/docs/books/tutorial/index.html */
/*
 * Copyright (c) 1995-1998 Sun Microsystems, Inc. All Rights Reserved.
 * 
 * Permission to use, copy, modify, and distribute this software and its
 * documentation for NON-COMMERCIAL purposes and without fee is hereby granted
 * provided that this copyright notice appears in all copies. Please refer to
 * the file "copyright.html" for further important copyright and licensing
 * information.
 * 
 * SUN MAKES NO REPRESENTATIONS OR WARRANTIES ABOUT THE SUITABILITY OF THE
 * SOFTWARE, EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR
 * NON-INFRINGEMENT. SUN SHALL NOT BE LIABLE FOR ANY DAMAGES SUFFERED BY
 * LICENSEE AS A RESULT OF USING, MODIFYING OR DISTRIBUTING THIS SOFTWARE OR ITS
 * DERIVATIVES.
 */
import java.text.CollationKey;
import java.text.Collator;
import java.util.Locale;
public class KeysDemo {
  public static void sortArray(CollationKey[] keys) {
    CollationKey tmp;
    for (int i = 0; i < keys.length; i++) {
      for (int j = i + 1; j < keys.length; j++) {
        // Compare the keys
        if (keys[i].rupareTo(keys[j]) > 0) {
          // Swap keys[i] and keys[j]
          tmp = keys[i];
          keys[i] = keys[j];
          keys[j] = tmp;
        }
      }
    }
  }
  static void displayWords(CollationKey[] keys) {
    for (int i = 0; i < keys.length; i++) {
      System.out.println(keys[i].getSourceString());
    }
  }
  static public void main(String[] args) {
    Collator enUSCollator = Collator.getInstance(new Locale("en", "US"));
    String[] words = { "peach", "apricot", "grape", "lemon" };
    CollationKey[] keys = new CollationKey[words.length];
    for (int k = 0; k < keys.length; k++) {
      keys[k] = enUSCollator.getCollationKey(words[k]);
    }
    sortArray(keys);
    displayWords(keys);
  }
}

Rules Demo

/* From http://java.sun.ru/docs/books/tutorial/index.html */
/*
 * Copyright (c) 1995-1998 Sun Microsystems, Inc. All Rights Reserved.
 * 
 * Permission to use, copy, modify, and distribute this software and its
 * documentation for NON-COMMERCIAL purposes and without fee is hereby granted
 * provided that this copyright notice appears in all copies. Please refer to
 * the file "copyright.html" for further important copyright and licensing
 * information.
 * 
 * SUN MAKES NO REPRESENTATIONS OR WARRANTIES ABOUT THE SUITABILITY OF THE
 * SOFTWARE, EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR
 * NON-INFRINGEMENT. SUN SHALL NOT BE LIABLE FOR ANY DAMAGES SUFFERED BY
 * LICENSEE AS A RESULT OF USING, MODIFYING OR DISTRIBUTING THIS SOFTWARE OR ITS
 * DERIVATIVES.
 */
import java.text.Collator;
import java.text.ParseException;
import java.text.RuleBasedCollator;
public class RulesDemo {
  public static void sortStrings(Collator collator, String[] words) {
    String tmp;
    for (int i = 0; i < words.length; i++) {
      for (int j = i + 1; j < words.length; j++) {
        // Compare elements of the words array
        if (collator.rupare(words[i], words[j]) > 0) {
          // Swap words[i] and words[j]
          tmp = words[i];
          words[i] = words[j];
          words[j] = tmp;
        }
      }
    }
  }
  public static void printStrings(String[] words) {
    for (int i = 0; i < words.length; i++) {
      System.out.println(words[i]);
    }
  }
  static public void main(String[] args) {
    String englishRules = ("< a,A < b,B < c,C < d,D < e,E < f,F "
        + "< g,G < h,H < i,I < j,J < k,K < l,L "
        + "< m,M < n,N < o,O < p,P < q,Q < r,R "
        + "< s,S < t,T < u,U < v,V < w,W < x,X " + "< y,Y < z,Z");
    String smallnTilde = new String("\u00F1");
    String capitalNTilde = new String("\u00D1");
    String traditionalSpanishRules = ("< a,A < b,B < c,C "
        + "< ch, cH, Ch, CH " + "< d,D < e,E < f,F "
        + "< g,G < h,H < i,I < j,J < k,K < l,L " + "< ll, lL, Ll, LL "
        + "< m,M < n,N " + "< " + smallnTilde + "," + capitalNTilde
        + " " + "< o,O < p,P < q,Q < r,R "
        + "< s,S < t,T < u,U < v,V < w,W < x,X " + "< y,Y < z,Z");
    String[] words = { "luz", "curioso", "llama", "chalina" };
    try {
      RuleBasedCollator enCollator = new RuleBasedCollator(englishRules);
      RuleBasedCollator spCollator = new RuleBasedCollator(
          traditionalSpanishRules);
      sortStrings(enCollator, words);
      printStrings(words);
      System.out.println();
      sortStrings(spCollator, words);
      printStrings(words);
    } catch (ParseException pe) {
      System.out.println("Parse exception for rules");
    }
  }
}