Question

Possible Duplicate:
Clearest way to comma-delimit a list (Java)?

I have a List<String> and I need to convert this list into the single line and insert delimiters between String elements of this List, except position before first element and after last element;

I have made a cycle like this:

StringBuffer sb = new StringBuffer();
for (String str : list) {
    sb.append(str).append(';');
}
if(sb.length() > 0)
    sb.deleteCharAt(sb.length() - 1);

I don’t like delete last token sentence.

So, Which is more elegant way to do same?

Answer 1

Don’t re-invent the wheel… the apache commons-lang library has the StringUtils.join() method, which does exactly what you want:

String s = StringUtils.join(list, ";"); // for example

Java 8 update:

In java 8, the String class has the join() method that does what you want:

String s = String.join(";", list);