Jfree圖表更改Y軸數據

Question

我使用Jfree圖表0.9.20的XYLineChartDemo繪製程序中正在運行的進程的執行時間。我的X軸代表時間，Y軸代表Pid。我如何編輯Jfreechart文件來使我的Y軸表示我想要的值而不是數字0範圍？還有一種方法可以將線繪製得更寬一些？

Answer 1

研究這個：

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; 
}