Java String Truncate truncate(String text)

Description

Truncates a string from the end (right) in one character

License

Apache License

Parameter

Parameter	Description
text	Text to truncate

Declaration

public static String truncate(String text) 

Method Source Code

//package com.java2s;
/*/*from   ww  w  .  ja v a 2 s  . co  m*/
 * EBI MetaboLights - http://www.ebi.ac.uk/metabolights
 * Cheminformatics and Metabolism group
 *
 * European Bioinformatics Institute (EMBL-EBI), European Molecular Biology Laboratory, Wellcome Trust Genome Campus, Hinxton, Cambridge CB10 1SD, United Kingdom
 *
 * Last modified: 9/9/13 4:37 PM
 * Modified by:   conesa
 *
 *
 * ?, EMBL, European Bioinformatics Institute, 2014.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.
 */

public class Main {
    /**
     * Truncates a string from left or right any numbers of characters
     * @param text Text to truncate
     * @param numCharacters number of characters to truncate
     * @param fromTheLeft
     * @return
     */
    public static String truncate(String text, int numCharacters, boolean fromTheLeft) {

        //If the text is NOT long enough...
        if (text.length() < numCharacters) {
            return "";
        }

        //if we have to
        if (fromTheLeft) {
            return text.substring(numCharacters);
        } else {
            return text.substring(0, text.length() - numCharacters);
        }
    }

    /**
     * Truncates a string from the end (right) in one character
     * @param text Text to truncate
     * @return
     */
    public static String truncate(String text) {
        return truncate(text, 1, false);
    }

    /**
     * Truncate a string from the end (right)
     * @param text Text to truncate
     * @param numCharacters number of characters to truncate
     * @return
     */
    public static String truncate(String text, int numCharacters) {
        return truncate(text, numCharacters, false);
    }

    /**
     * Truncates a string from the left or the right based on a char
     * @param text text to truncate
     * @param find character to find
     * //@param SearchFromTheLeft start the search from the left if true, otherwise from the right.
     * @param fromTheLeft if true , truncate from the left.
     * @return
     */
    public static String truncate(String text, String find, boolean searchFromTheLeft, boolean fromTheLeft) {

        int pos;

        //If we need the left part...
        if (searchFromTheLeft) {

            //Get the position of the char to find
            pos = text.indexOf(find);

        } else {

            //Get the position from the end plus the length of the string we are finding
            pos = text.lastIndexOf(find);

        }

        //If not found
        if (pos == -1)
            return "";

        //If we want to remove the right part...
        if (!fromTheLeft) {
            //...truncate "pos" has to be from the end
            pos = text.length() - pos;
        } else {
            //We want to remove the left part, included the "find" string. So we need to increase the position
            pos = pos + find.length();
        }

        //Call truncate by position
        return truncate(text, pos, fromTheLeft);

    }
}

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