Write code to join
//package com.book2s; import java.util.Arrays; import java.util.Iterator; public class Main { public static void main(String[] argv) { String[] items = new String[] { "1", "abc", "level", null, "book2s.com", "asdf 123" }; String separator = "book2s.com"; System.out.println(join(items, separator)); }/* www . java 2s . c o m*/ public static String join(String[] items, String separator) { return join(Arrays.asList(items), separator); } public static String join(Iterable<String> items, String separator) { final StringBuilder builder = new StringBuilder(); final Iterator<String> it = items.iterator(); while (it.hasNext()) { builder.append(it.next()); if (it.hasNext()) { builder.append(separator); } } return builder.toString(); } public static String toString(Object object) { if (object == null) { return "null"; } return object.toString(); } public static String toString(Iterable<?> it, String separator) { final StringBuilder builder = new StringBuilder(); final Iterator<?> iterator = it.iterator(); while (iterator.hasNext()) { builder.append(iterator.next().toString()); if (iterator.hasNext()) { builder.append(separator); } } return builder.toString(); } }