Make a string from a collection separating each element by sep. - Java java.util

Java examples for java.util:Collection Element

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Description

Make a string from a collection separating each element by sep.

Demo Code

/**//from  w  ww.ja va  2  s . c  om
 *  Copyright 2009, 2010 The Regents of the University of California
 *  Licensed under the Educational Community 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.osedu.org/licenses/ECL-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.
 *
 */
//package com.java2s;

import java.util.Collection;

public class Main {
    public static void main(String[] argv) {
        Collection as = java.util.Arrays.asList("asdf", "java2s.com");
        String sep = "java2s.com";
        System.out.println(mkString(as, sep));
    }

    /**
     * Make a string from a collection separating each element by <code>sep</code>.
     */
    public static String mkString(Collection<?> as, String sep) {
        StringBuffer b = new StringBuffer();
        for (Object a : as) {
            b.append(a).append(sep);
        }
        return b.substring(0, Math.max(b.length() - sep.length(), 0));
    }
}

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