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    <p>One approach is to create a <code>StringReader</code> from the string, wrap it in a <code>BufferedReader</code> and use that to read lines. Alternatively, you could just split on <code>\n</code> to get the lines, of course...</p> <pre><code>String[] allLines = text.split("\n"); List&lt;String&gt; selectedLines = new ArrayList&lt;String&gt;(); for (int i = 0; i &lt; allLines.length; i += 100) { selectedLines.add(allLines[i]); } </code></pre> <p>This is simpler code than using a <code>BufferedReader</code>, but it does mean having the complete split string in memory (as well as the original, at least temporarily, of course). It's also less flexible in terms of being adapted to reading lines from other sources such as a file. But if it's all you need, it's pretty straightforward :)</p> <p>EDIT: If the start indexes are needed too, it becomes <em>slightly</em> more complicated... but not too bad. You probably want to encapsulate the "start and line" in a single class, but for the sake of brevity:</p> <pre><code>String[] allLines = text.split("\n"); List&lt;String&gt; selectedLines = new ArrayList&lt;String&gt;(); List&lt;Integer&gt; selectedIndexes = new ArrayList&lt;Integer&gt;(); int index = 0; for (int i = 0; i &lt; allLines.length; i++) { if (i % 100 == 0) { selectedLines.add(allLines[i]); selectedIndexes.add(index); } index += allLines[i].length + 1; // Add 1 for the trailing "\n" } </code></pre> <p>Of course given the start index and the line, you can get the end index just by adding the line length :)</p>
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    1. POJava: How To Grab Each nth Lines From a String
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    1. COSorry I didn't put this in the question, but would it be possible to get the start index and end index of each 100 lines?
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    2. CO@AlexPriceAp: Sure - but where do you want them? Will put them in separate ArrayLists for the moment...
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    3. COA seperate ArrayList is fine. The reason I want the start and end is so I can use them as boundaries for my SyntaxHighlighter I'm developing, so I can highlight every 100 (for the moment) lines, as I'm developing for mobile devices and it can be slow with big files!
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