Java String Truncate truncate(String originalString, int size)

Description

If the size of the original string is larger than the passed in size, this method will remove the vowels from the original string.

License

Open Source License

Declaration

public static String truncate(String originalString, int size) 

Method Source Code

//package com.java2s;
/*******************************************************************************
 * Copyright (c) 1998, 2015 Oracle and/or its affiliates. All rights reserved.
 * This program and the accompanying materials are made available under the
 * terms of the Eclipse Public License v1.0 and Eclipse Distribution License v. 1.0
 * which accompanies this distribution.//from  www  . j a  v a  2 s .c  om
 * The Eclipse Public License is available at http://www.eclipse.org/legal/epl-v10.html
 * and the Eclipse Distribution License is available at
 * http://www.eclipse.org/org/documents/edl-v10.php.
 *
 * Contributors:
 *     Oracle - initial API and implementation from Oracle TopLink
 *     dminsky - added countOccurrencesOf(Object, List) API
 *     08/23/2010-2.2 Michael O'Brien
 *        - 323043: application.xml module ordering may cause weaving not to occur causing an NPE.
 *                       warn if expected "_persistence_*_vh" method not found
 *                       instead of throwing NPE during deploy validation.
 ******************************************************************************/

public class Main {
    /**
     * If the size of the original string is larger than the passed in size,
     * this method will remove the vowels from the original string.
     *
     * The removal starts backward from the end of original string, and stops if the
     * resulting string size is equal to the passed in size.
     *
     * If the resulting string is still larger than the passed in size after
     * removing all vowels, the end of the resulting string will be truncated.
     */
    public static String truncate(String originalString, int size) {
        if (originalString.length() <= size) {
            //no removal and truncation needed
            return originalString;
        }
        String vowels = "AaEeIiOoUu";
        StringBuilder newStringBufferTmp = new StringBuilder(
                originalString.length());

        //need to remove the extra characters
        int counter = originalString.length() - size;
        for (int index = (originalString.length() - 1); index >= 0; index--) {
            //search from the back to the front, if vowel found, do not append it to the resulting (temp) string!
            //i.e. if vowel not found, append the chararcter to the new string buffer.
            if (vowels.indexOf(originalString.charAt(index)) == -1) {
                newStringBufferTmp.append(originalString.charAt(index));
            } else {
                //vowel found! do NOT append it to the temp buffer, and decrease the counter
                counter--;
                if (counter == 0) {
                    //if the exceeded characters (counter) of vowel haven been removed, the total
                    //string size should be equal to the limits, so append the reversed remaining string
                    //to the new string, break the loop and return the shrunk string.
                    StringBuilder newStringBuffer = new StringBuilder(size);
                    newStringBuffer.append(originalString.substring(0,
                            index));
                    //need to reverse the string
                    //bug fix: 3016423. append(BunfferString) is jdk1.4 version api. Use append(String) instead
                    //in order to support jdk1.3.
                    newStringBuffer.append(newStringBufferTmp.reverse()
                            .toString());
                    return newStringBuffer.toString();
                }
            }
        }

        //the shrunk string still too long, revrese the order back and truncate it!
        return newStringBufferTmp.reverse().toString().substring(0, size);
    }
}

Related

1. truncate(String message)
2. truncate(String message, int length, boolean includeCount)
3. truncate(String message, String substring)
4. truncate(String original, int number)
5. truncate(String original, String ellipsis, int maxLength)
6. truncate(String s)
7. truncate(String s)
8. truncate(String s, int begin, int end)
9. truncate(String s, int i)