JFreeChart动态画折线图的方法

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脚本之家。