BreakIterator.isBoundary(int offset) throws IllegalArgumentException in case when
offset is out of bounds of the text.

Please find below the sample for the issue:
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        String text = "hello world";
        int values[] = {-100, -1, text.length() + 1, 100};
        BreakIterator iter = BreakIterator.getWordInstance();
        iter.setText("hello world");

        for (int offset : values) {
            try {
                iter.isBoundary(offset);
                System.out.println("not thrown for offset: " + offset);
            } catch (IllegalArgumentException ex) {
            }
        }
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