jfreechart

I want to change a bar chart data in a loop and I have no idea how to do that. My code: DefaultCategoryDataset barChartData = new DefaultCategoryDataset(); barChartData.setValue(0, "Values","1"); barChartData.setValue(0, "Values","2"); barChartData.setValue(0, "Values","3"); JFreeChart barChart = ChartFactory.createBarChart("Proxi", "Sensors", "Value", barChartData, PlotOrientation.VERTICAL, false, true, false); CategoryPlot barchrt = barChart.getCategoryPlot(); barchrt.setRangeGridlinePaint(Color.ORANGE); ChartPanel barPanel = new ChartPanel(barChart); barPanel.setBounds(0, 0, 731, 456);

I need to change this code in such a way that X Axis contains time stamps in the format "H:M", e.g. 10:00. private static XYDataset createCategoryDataset(Map<Integer,List<Task>> staffLevels) { String series1 = "Task demand"; DefaultXYDataset dataset = new DefaultXYDataset(); double[][] data = new double[2][staffLevels.size()]; int min_per_hour = 60; for (int i=0; i<staffLevels.size(); i++) { int seconds = i*Parameters.MIN_TIME_UNIT*60; int hours = (i*Parameters.MIN_TIME_UNIT) / min_per_hour; int minutes = (seconds / min_per_hour) % min_per_hour; data[0][i] = hours + ":" + minutes; data[1][i] =

The program will receive data every second and draw them on time Series chart. However, once I create two series, I cannot add new value to it. It displays a straight line only. How do I append data to a specified series? I.e. YYY . Based on this example , here's what I'm doing: ... // Data set. final DynamicTimeSeriesCollection dataset = new DynamicTimeSeriesCollection( 2, COUNT, new Second() ); dataset.setTimeBase( new Second( 0, 0, 0, 1, 1, 2011 ) ); dataset.addSeries( gaussianData(), 0, "XXX" ); dataset.addSeries( gaussianData(), 1, "YYY" ); // Chart. JFreeChart chart = createChart(

Friends, i am developing a java application. Thats for performance monitoring. on that i am getting values in one class and drawing a graph in another class. i want to use swingworker to perform those two class alternatively. ResultSet rs; Connection conn = null; conn = (Connection)getMySqlConnection(); Statement st = conn.createStatement(); rs = st.executeQuery("SHOW GLOBAL STATUS"); while(rs.next()) { Map_MySql.put(rs.getString(1), rs.getString(2)); } conn.close(); Above class for collecting server status and store it in hash map. this class called as "MySQLClass". System.out.println("Graph