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copied!<p>You could read line to line the file and for every line you could control with a regular expression (http://www.vogella.de/articles/JavaRegularExpressions/article.html) if the line presents exactly 4 comma. If the line presents exactly 4 comma you can split the line with String.split and fill the 4 array otherwise you pass at next line.</p> <pre><code> public double[][] populateArray(int scan1Count){ double[] outputArray1 = new double[scan1Count]; double[] outputArray2 = new double[scan1Count]; double[] outputArray3 = new double[scan1Count]; double[] outputArray4 = new double[scan1Count]; //Read File Line By Line try { File tempfile = new File("samedatafile.txt"); FileInputStream fis = new FileInputStream(tempfile); DataInputStream in = new DataInputStream(fis); BufferedReader br = new BufferedReader(new InputStreamReader(in)); String strLine; int i = 0; while ((strLine = br.readLine()) != null) { Pattern pattern = Pattern.compile("-{0,1}\\d+.\\d+,-{0,1}\\d+.\\d+,-{0,1}\\d+.\\d+,-{0,1}\\d+.\\d+,"); Matcher matcher = pattern.matcher(strLine); if (matcher.matches()){ String[] split = strLine.split(","); outputArray1[i] = Double.parseDouble(split[0]); outputArray2[i] = Double.parseDouble(split[1]); outputArray3[i] = Double.parseDouble(split[2]); outputArray4[i] = Double.parseDouble(split[3]); } i++; } } catch (IOException e) { e.printStackTrace(); } double[][] temp = new double[4][]; temp[0]= outputArray1; temp[1]= outputArray2; temp[2]= outputArray3; temp[3]= outputArray4; return temp; } </code></pre>

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