Part 10 in a Series by Jerome Mourits, Guest blogger...
Join makes it easy to join Strings separated by a delimiter.
Before:
public class ShoppingList {
private List<Item> items = ...;
...
public String toString() {
StringBuilder stringBuilder = new StringBuilder();
for (Iterator<Item> s = items.iterator(); s.hasNext(); ) {
stringBuilder.append(s.next());
if (s.hasNext()) {
stringBuilder.append(" and ");
}
}
return stringBuilder.toString();
}
}`</pre>
### After:
<pre class="prettyprint">`public class ShoppingList {
private List<Item> items = ...;
...
public String toString() {
return Join.join(" and ", items);
}
}
Easy! Join supports Iterators, Iterables, arrays and varargs. You can also have join append the tokens to a supplied Appendable, like StringBuilder.