Originally Posted by Ezzaral

I don't think you want an XYSeries for that. If you want it to be a line chart (bar chart seems more appropriate to me, but you seem to want the line chart), try this instead

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Java Syntax (Toggle Plain Text)

private CategoryDataset createDataset() throws Exception {
 
    DefaultCategoryDataset dataset = new DefaultCategoryDataset();
    dataset.addValue(255, "Errors", "error1");
    dataset.addValue(34, "Errors", "error2");
    dataset.addValue(111, "Errors", "error5");
    dataset.addValue(23, "Errors", "error3");
 
    return dataset;
}
 
private JFreeChart createChart(CategoryDataset dataset) {
    // create the chart...
    JFreeChart chart = ChartFactory.createLineChart(
            "Medida", // chart title
            "Error Code", // x axis label
            "Count", // y axis label
            dataset, // data
            PlotOrientation.VERTICAL,
            true, // include legend
            true, // tooltips
            false // urls
    );
 
    return chart;
}

private CategoryDataset createDataset() throws Exception { DefaultCategoryDataset dataset = new DefaultCategoryDataset(); dataset.addValue(255, "Errors", "error1"); dataset.addValue(34, "Errors", "error2"); dataset.addValue(111, "Errors", "error5"); dataset.addValue(23, "Errors", "error3"); return dataset; } private JFreeChart createChart(CategoryDataset dataset) { // create the chart... JFreeChart chart = ChartFactory.createLineChart( "Medida", // chart title "Error Code", // x axis label "Count", // y axis label dataset, // data PlotOrientation.VERTICAL, true, // include legend true, // tooltips false // urls ); return chart; }

All you have to do is build that category dataset with the first and second elements of your spilt() on the text file line.