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JFree Bar Chart - Bar width?
原标题:JFree Bar Chart - Bar width?

在图表中,数据是非行在运行时的动态。 我的问题是:

  1. If data set is large chart get shrink ed, it s not clearly visible .
  2. 如果数据组的数据数量较少(没有记录套),那么图表的宽度就很大。 我如何控制它?

    chartPanel = new ChartPanel(test());
    jPanel1.add(chartPanel, BorderLayout.CENTER);
    
    
    public static JFreeChart test() {
        String query = "SELECT num1,num2 from test1 ;
        JFreeChart cha;
        try {
            JDBCCategoryDataset dataset = new JDBCCategoryDataset("jdbc:mysql://localhost:3306/db", "com.mysql.jdbc.Driver", "root", "");
            dataset.executeQuery(query);
            cha = ChartFactory.createBarChart3D("xxxx", "xxx", "xxx", dataset, PlotOrientation.VERTICAL, true, true, false);
    
        } catch (Exception e) {
            System.out.println(e);
        }
        return cha;
    }
    

是否有办法调整《Barchart》中的酒吧。

SOLVED Width of the bar in Jfreechart

问题回答

如果你能够尝试确定你可以显示的图表的最大数量。

因为,如果你设法确定酒吧的宽度,但如果酒吧数量大,则酒吧会重叠。

因此,确定你的图表可显示的最大数量。





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