Java String Truncate truncate(String str, int maxLen)

Description

truncates a string regardless of its length.

License

Open Source License

Declaration

public static String truncate(String str, int maxLen) 

Method Source Code

//package com.java2s;
/*//  www.j  a  v a  2s . c  o  m
Copyright (c) 2008 Arno Haase.
All rights reserved. This program and the accompanying materials
are made available under the terms of the Eclipse Public License v1.0
which accompanies this distribution, and is available at
http://www.eclipse.org/legal/epl-v10.html
    
Contributors:
Arno Haase - initial API and implementation
 */

public class Main {
    /**
     * truncates a string regardless of its length. This method is a workaround
     * for a shortcoming of String.substring (int, int) that is unable to handle
     * the case where the number of characters would extend beyond the end of
     * the string.
     */
    public static String truncate(String str, int maxLen) {
        if (str == null || str.length() < maxLen)
            return str;
        if (maxLen < 0)
            return "";
        return str.substring(0, maxLen);
    }

    /**
     * same as String.substring, except that this version handles the case
     * robustly when the index is out of bounds.
     */
    public static String substring(String str, int beginIndex) {
        if (str == null)
            return null;
        if (beginIndex < 0)
            return str;
        if (beginIndex >= str.length())
            return "";

        return str.substring(beginIndex);
    }

    /**
     * same as String.substring, except that this version handles the case
     * robustly when one or both of the indexes is out of bounds.
     */
    public static String substring(String str, int beginIndex, int endIndex) {
        if (str == null)
            return null;
        if (beginIndex > endIndex)
            return "";
        if (beginIndex < 0)
            beginIndex = 0;
        if (endIndex > str.length())
            endIndex = str.length();

        return str.substring(beginIndex, endIndex);
    }
}

Related

1. truncate(String str, int length)
2. truncate(String str, int length)
3. truncate(String str, int length)
4. truncate(String str, int max)
5. truncate(String str, int max)
6. truncate(String str, int maxSize)
7. truncate(String str, int maxSize)
8. truncate(String str, int n)
9. truncate(String str, int size, boolean useEllipsis)