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POAn occasional error with BufferedReader in Java
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copied!<p>I get an <code>ArrayIndexOutOfBoundsException</code> when I invoke this function, but not always. Out of <strong>10 attempts</strong>, I got an error <strong>3 times</strong>, and the remaining <strong>7 times</strong> it worked perfectly fine. </p> <pre><code>void readTrainingData(Model m) throws FileNotFoundException { BufferedReader br = null; try { br = new BufferedReader(new FileReader("training_data.csv")); } catch (IOException ex) { throw new FileNotFoundException(); } String line = ""; int i = 0; int j; try { while((line = br.readLine()) != null) { String[] coords = line.split(","); if (coords[0] != null && coords[1] != null) { m.x[i] = Float.parseFloat(coords[0]); m.y[i] = Float.parseFloat(coords[1]); } else { System.out.println("Check training_data.csv"); } j = 0; i++; } } catch (IOException ex) { System.out.println("Problem reading file"); throw new RuntimeException(ex); } } </code></pre> <p>The error is as follows :</p> <pre><code>Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: 1 at polygonprobability.Util.readTrainingData(Util.java:215) </code></pre> <p>I can't debug it because whenever I'm trying to, I don't get the error.</p> <p>I'm thoroughly confused. Please help.</p> <p>EDIT : I changed the conditional to</p> <pre><code>if (coords[0] != null && coords[1] != null && coords.length == 2) { m.x[i] = Float.parseFloat(coords[0]); m.y[i] = Float.parseFloat(coords[1]); } </code></pre> <p>Line 215 happens to be the if conditional itself.</p> <p>Even after the change, the error persists.</p>

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