Truncate String on closest word boundary.

Question

Is it possible to truncate a Java string to the closest word boundary after a number of characters. Similar to the PHP wordwrap() function, shown in this example.

Answer 1

Use a java.text.BreakIterator, something like this:

String s = ...;
int number_chars = ...;
BreakIterator bi = BreakIterator.getWordInstance();
bi.setText(s);
int first_after = bi.following(number_chars);
// to truncate:
s = s.substring(0, first_after);

Answer 2

You can use regular expression

Matcher m = Pattern.compile("^.{0,10}\\b").matches(str);
m.find();
String first10char = m.group(0);