Question

JFreeChart如何将折线图的线变粗如何改变折线图的颜色

JFreeChart若何将折线图的线变粗若何改变折线图的色彩吗

Answer 1

辠aultCategoryDataset dataset = new DefaultCategoryDataset(); dataset.addValue(y轴,x轴,时光); dataset.addValue(y轴,x轴,时光); dataset.addValue(y轴,x轴,时光); String title =用户拜访统计; JFreeChart chart = ChartFactory.createBarChart3D(title, , 拜访人数, dataset, PlotOrientation.VERTICAL, true, false, false); String filename = ServletUtilities.saveChartAsPNG(chart, 500, 300, null, session); String graphURL = request.getContextPath() /servlet/DisplayChart吗filename= filename; % P ALIGN=left img src=%=graphURL % width=500 height=300 border=0 usemap=#%= filename % /P你换一个办法就行,这个好象是柱型图

Answer 2

辠aultCategoryDataset dataset = new DefaultCategoryDataset(); dataset.addValue(y轴,x轴,时光); dataset.addValue(y轴,x轴,时光); dataset.addValue(y轴,x轴,时光); String title =用户拜访统计; JFreeChart chart = ChartFactory.createBarChart3D(title, , 拜访人数, dataset, PlotOrientation.VERTICAL, true, false, false); String filename = ServletUtilities.saveChartAsPNG(chart, 500, 300, null, session); String graphURL = request.getContextPath() /servlet/DisplayChart吗filename= filename; % P ALIGN=left img src=%=graphURL % width=500 height=300 border=0 usemap=#%= filename % /P你换一个办法就行,这个好象是柱型图 查看原帖>>

Answer 3

经由过程XYLineAndShapeRenderer改setSeriesPaint改色彩setSeriesStroke改画笔应当是如许这些demo上都有多看demo里面的参数setSeriesPaintpublic void setSeriesPaint(int series,java.awt.Paint paint,boolean notify)Sets the paint used for a series and, if requested, sends a RendererChangeEvent to all registered listeners.Parameters:series - the series index. 曲线序号paint - the paint (null permitted).色彩notify - notify listeners吗是否通知监听器另一个类似改变宽度：renderer.setSeriesStroke(0, new BasicStroke(2.0F));改变色彩：renderer.setSeriesPaint(0, Color.green);具体参数根据须要自行设定两个办法中的0 这里都是指折线的索引0表示第一条 查看原帖>>