Joins strings with separator. - Java java.lang

Java examples for java.lang:String Join

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Description

Joins strings with separator.

Demo Code


//package com.java2s;
import java.util.Iterator;

public class Main {
    /**/*from w ww .  j a v a2 s. c  o m*/
     * Joins strings with separator.
     *
     * @param string
     *            of separator
     * @param array
     *            array of object to be joined
     * @return joined string
     */
    public static String join(String glue, Object... array) {
        StringBuilder builder = new StringBuilder();

        if (array.length != 0) {
            builder.append(array[0]);
        } else {
            return "";
        }

        for (int i = 1; i < array.length; i++) {
            builder.append(glue);
            builder.append(array[i]);
        }

        return builder.toString();
    }

    /**
     * Joins strings with separator.
     *
     * @param sep
     *            string of separator
     * @param iterable
     *            <code>java.lang.Iterable</code> object to be joined
     * @return joined string
     */
    public static String join(String sep, Iterable<?> iterable) {
        Iterator<?> iter = iterable.iterator();

        if (!iter.hasNext()) {
            return "";
        }

        StringBuilder builder = new StringBuilder();
        builder.append(iter.next());

        while (iter.hasNext()) {
            builder.append(sep);
            builder.append(iter.next());
        }

        return builder.toString();
    }
}

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