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copied!<p>You need to read the file line by line. It is done with a <code>BufferedReader</code> like this :</p> <pre><code>try { FileInputStream fstream = new FileInputStream("input.txt"); BufferedReader br = new BufferedReader(new InputStreamReader(fstream)); String strLine; int lineNumber = 0; double [] a = null; double [] b = null; // Read File Line By Line while ((strLine = br.readLine()) != null) { lineNumber++; if( lineNumber == 4 ){ a = getDoubleArray(strLine); }else if( lineNumber == 5 ){ b = getDoubleArray(strLine); } } // Close the input stream in.close(); //print the contents of a for(int i = 0; i < a.length; i++){ System.out.println("a["+i+"] = "+a[i]); } } catch (Exception e) {// Catch exception if any System.err.println("Error: " + e.getMessage()); } </code></pre> <p>Assuming your <code>"a"</code> and<code>"b"</code> are on the fourth and fifth line of the file, you need to call a method when these lines are met that will return an array of <code>double</code> :</p> <pre><code>private static double[] getDoubleArray(String strLine) { double[] a; String[] split = strLine.split("[,)]"); //split the line at the ',' and ')' characters a = new double[split.length-1]; for(int i = 0; i < a.length; i++){ a[i] = Double.parseDouble(split[i+1]); //get the double value of the String } return a; } </code></pre> <p>Hope this helps. I would still highly recommend reading the Java <a href="http://download.oracle.com/javase/tutorial/essential/io/" rel="nofollow">I/O</a> and <a href="http://download.oracle.com/javase/tutorial/java/data/strings.html" rel="nofollow">String</a> tutorials.</p>

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