Java List Null Empty isNotEmpty(List input)

Description

is Not Empty

License

MIT License

Declaration

public static boolean isNotEmpty(List<? extends CharSequence> input) 

Method Source Code

//package com.java2s;
/* ========================================================================
 * PlantUML : a free UML diagram generator
 * ========================================================================
 *
 * (C) Copyright 2009-2017, Arnaud Roques
 *
 * Project Info:  http://plantuml.com/*from  w  w  w. ja  v  a 2 s  .  c  o m*/
 * 
 * This file is part of PlantUML.
 *
 * Licensed under The MIT License (Massachusetts Institute of Technology License)
 * 
 * See http://opensource.org/licenses/MIT
 * 
 * Permission is hereby granted, free of charge, to any person obtaining
 * a copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 * 
 * The above copyright notice and this permission notice shall be included
 * in all copies or substantial portions of the Software.
 * 
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
 * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR
 * IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 * 
 *
 * Original Author:  Arnaud Roques
 */

import java.util.List;

public class Main {
    public static boolean isNotEmpty(String input) {
        return input != null && trin(input).length() > 0;
    }

    public static boolean isNotEmpty(List<? extends CharSequence> input) {
        return input != null && input.size() > 0;
    }

    public static String trin(CharSequence arg) {
        if (arg.length() == 0) {
            return arg.toString();
        }
        int i = 0;
        while (i < arg.length() && isSpaceOrTab(arg.charAt(i))) {
            i++;
        }
        int j = arg.length() - 1;
        while (j >= i && isSpaceOrTab(arg.charAt(j))) {
            j--;
        }
        if (i == 0 && j == arg.length() - 1) {
            return arg.toString();
        }
        return arg.subSequence(i, j + 1).toString();
    }

    private static boolean isSpaceOrTab(char c) {
        return c == ' ' || c == '\t';
    }
}

Related

1. isNotEmpty(final List aList)
2. isNotEmpty(List list)
3. isNotEmpty(List list)
4. isNotEmpty(List values)
5. isNotEmpty(List input)
6. isNotEmpty(List list)
7. isNotEmpty(List value)
8. isNotEmpty(List list)
9. isNotEmpty(List list)