Java Collection Concatenate concatElements(final Collection c, final String separator)

Description

Joins the String representations of the elements of a given Collection using a given separator.

License

Apache License

Parameter

Parameter	Description
c	the Collection whose elements should be joined
separator	the separator to use for joining

Return

the join result as a

Declaration

public static StringBuilder concatElements(final Collection<?> c, final String separator) 

Method Source Code

//package com.java2s;
//License from project: Apache License 

import java.util.Collection;
import java.util.Iterator;

public class Main {
    /**/*from  ww w .ja v  a 2s  .c o m*/
     * Joins the {@link String} representations of the elements of a given
     * {@link Collection} using a given separator.
     * 
     * @param c
     *           the {@link Collection} whose elements should be joined
     * @param separator
     *           the separator to use for joining
     * @return the join result as a {@link StringBuilder}
     */
    public static StringBuilder concatElements(final Collection<?> c, final String separator) {
        final StringBuilder builder = new StringBuilder();

        if (c.isEmpty()) {
            return builder;
        }

        final Iterator<?> oIterator = c.iterator();
        builder.append(oIterator.next());

        while (oIterator.hasNext()) {
            builder.append(separator).append(oIterator.next());
        }

        return builder;
    }
}

Related

1. concat(final Collection... collections)
2. concat(final Collection... collections)
3. concat(String separator, Collection args)
4. concat(String[] first, Collection second)
5. concatCollection(Collection collection)
6. concatenate(Collection collections)
7. concatenate(Collection coll)
8. concatenate(Collection list)
9. concatenate(final Collection objects, final String separator)