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copied!<p>I would implement <code>search</code> as follows - </p> <pre><code>public static List<Interval> search( String searchText, String[][] data) { List<Interval> al = new ArrayList<>(); if (searchText != null) { searchText = searchText.trim().toUpperCase(); char[] toMatch = searchText.toCharArray(); for (int i = 0; i < data.length; i++) { if (data[i] != null && data.length > i && data[i].length > 0 && data[i][0].charAt(0) == toMatch[0]) { boolean matched = true; for (int t = 1; t < toMatch.length; t++) { if (i + t > data.length || data[i + t][0].charAt(0) != toMatch[t]) { i += (t - 1); matched = false; break; } } if (matched) { Interval interval = new Interval(); interval.start = i - 1; interval.end = interval.start + (toMatch.length - 1); al.add(interval); } } } } return al; } </code></pre> <p>And, I would modify <code>Interval</code> to add a <code>toString()</code> like this</p> <pre><code>public String toString() { return String.valueOf(start) + "-" + end; } </code></pre> <p>Finally, to test it I would use this main method.</p> <pre><code>public static void main(String[] args) { String[][] test = { { "N" }, { "A" }, { "N" }, { "A" }, { "T" }, { "A" }, { "N" }, { "E" }, { "X" }, { "T" }, { "E" }, { "R" }, { "N" }, { "B" }, { "N" }, { "E" }, { "X" }, { "T" } }; List<Interval> al = search("next", test); for (Interval i : al) { System.out.println(i); } } </code></pre> <p>And I did receive this output -</p> <pre><code>5-8 13-16 </code></pre>

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