本文实例为大家分享了JFreeChart动态画折线图的具体代码，供大家参考，具体内容如下

每隔一秒画一次，一分钟后重新画

需要的jar包是：gnujaxp.jar，jcommon-1.0.16.jar，jfreechart-1.0.13.jar

public class JFreeZheXianTest{ public static XYSeries xyCPUseries = new XYSeries("CPU"); public static int hundroud = 0; public static JFreeChart jfreechart = null; public JPanel getCPUJFreeChart(){ jfreechart = ChartFactory.createXYLineChart( null, null, null, createDataset1(), PlotOrientation.VERTICAL, false, true, false); StandardChartTheme mChartTheme = new StandardChartTheme("CN"); mChartTheme.setLargeFont(new Font("黑体", Font.BOLD, 20)); mChartTheme.setExtraLargeFont(new Font("宋体", Font.PLAIN, 15)); mChartTheme.setRegularFont(new Font("宋体", Font.PLAIN, 15)); ChartFactory.setChartTheme(mChartTheme); jfreechart.setBorderPaint(new Color(0,204,205)); jfreechart.setBorderVisible(true); XYPlot xyplot = (XYPlot) jfreechart.getPlot(); // Y轴 NumberAxis numberaxis = (NumberAxis) xyplot.getRangeAxis(); numberaxis.setLowerBound(0); numberaxis.setUpperBound(100); numberaxis.setTickUnit(new NumberTickUnit(100d)); // 只显示整数值 numberaxis.setStandardTickUnits(NumberAxis.createIntegerTickUnits()); // numberaxis.setAutoRangeIncludesZero(true); numberaxis.setLowerMargin(0); // 数据轴下（左）边距 ­ numberaxis.setMinorTickMarksVisible(false);// 标记线是否显示 numberaxis.setTickMarkInsideLength(0);// 外刻度线向内长度 numberaxis.setTickMarkOutsideLength(0); // X轴的设计 NumberAxis x = (NumberAxis) xyplot.getDomainAxis(); x.setAutoRange(true);// 自动设置数据轴数据范围 // 自己设置横坐标的值 x.setAutoTickUnitSelection(false); x.setTickUnit(new NumberTickUnit(60d)); // 设置最大的显示值和最小的显示值 x.setLowerBound(0); x.setUpperBound(60); // 数据轴的数据标签：只显示整数标签 x.setStandardTickUnits(NumberAxis.createIntegerTickUnits()); x.setAxisLineVisible(true);// X轴竖线是否显示 x.setTickMarksVisible(false);// 标记线是否显示 RectangleInsets offset = new RectangleInsets(0, 0, 0, 0); xyplot.setAxisOffset(offset);// 坐标轴到数据区的间距 xyplot.setBackgroundAlpha(0.0f);// 去掉柱状图的背景色 xyplot.setOutlinePaint(null);// 去掉边框 // ChartPanel chartPanel = new ChartPanel(jfreechart); // chartPanel.restoreAutoDomainBounds();//重置X轴 ChartPanel chartPanel = new ChartPanel(jfreechart, true); return chartPanel; } /** * 该方法是数据的设计 * * @return */ public static XYDataset createDataset1() { XYSeriesCollection xyseriescollection = new XYSeriesCollection(); xyseriescollection.addSeries(xyCPUseries); return xyseriescollection; } /** * 随机生成的数据 */ public static void dynamicRun() { int i = 0; while (true) { double factor = Math.random()*100; hundroud = (int)factor; jfreechart.setTitle("CPU的大小是： "+hundroud+"%"); jfreechart.getTitle().setFont(new Font("微软雅黑", 0, 16));//设置标题字体 xyCPUseries.add(i, factor); try { Thread.currentThread(); Thread.sleep(1000); } catch (InterruptedException e) { e.printStackTrace(); } i++; if (i == 60){ i=0; xyCPUseries.delete(0, 59); continue; } } } public static void main(String[] args) { JFreeZheXianTest jz = new JFreeZheXianTest(); JFrame frame = new JFrame(); frame.setSize(700, 500); frame.getContentPane().add(jz.getCPUJFreeChart(), BorderLayout.CENTER); frame.setVisible(true); frame.setLocationRelativeTo(null); // 窗口居于屏幕正中央 frame.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE); dynamicRun(); }}

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。