Jfree图表更改Y轴数据

Question

我使用Jfree图表0.9.20的XYLineChartDemo绘制程序中正在运行的进程的执行时间。我的X轴代表时间，Y轴代表Pid。我如何编辑Jfreechart文件来使我的Y轴表示我想要的值而不是数字0范围？还有一种方法可以将线绘制得更宽一些？

Answer 1

研究这个：

public JFreeChart createChart(String axisX, String axisY){ 

    JFreeChart chart = ChartFactory.createTimeSeriesChart(null, axisX, axisY, dataSeries, true, true, false); 

    final XYLineAndShapeRenderer renderer = new XYLineAndShapeRenderer(); 
    renderer.setSeriesLinesVisible(0,true); 
    renderer.setSeriesShapesVisible(0, true); 

    //percentage (y-axis) 
    final NumberAxis percentAxis = new NumberAxis(axisY); 
    percentAxis.setInverted(false); 
    percentAxis.setRange(0.0, 100.0); 

    //time (x-axis) 
    final DateAxis timeAxis = new DateAxis(axisX); 
    timeAxis.setStandardTickUnits(DateAxis.createStandardDateTickUnits(TimeZone.getDefault(), Locale.ENGLISH)); 

    double range = 0; 

    switch (format){ 
     case ONE_MINUTE_RANGE: range = 60*1000; break; 
     case TEN_MINUTE_RANGE: range = 10*60*1000; break; 
     case ONE_HOUR_RANGE: range = 60*60*1000; break; 
    } 

    timeAxis.setRange(System.currentTimeMillis()-range/2, System.currentTimeMillis()+range/2); //time duration based on format chosen 

    XYPlot plot = chart.getXYPlot(); 
    plot.setDomainAxis(timeAxis); 
    plot.setRangeAxis(percentAxis); 

    plot.setBackgroundPaint(Color.white); 
    plot.setRangeGridlinePaint(Color.gray); 
    plot.setRangeZeroBaselinePaint(Color.gray); 
    plot.setDomainGridlinePaint(Color.gray); 
    plot.setForegroundAlpha(0.5f); 
    plot.setRenderer(renderer); 

    chart.setBackgroundPaint(Color.white); 

    return chart; 
}