How to render Date Values on X Axis of LineChart in 2 Lines using JFreeChart?

Question

I am using JFreeChart to render a LineChart using CategoryPlot. Something like:

JFreeChart chart = ChartFactory.createLineChart("Daily Revenue",
                "Days", "Revenue", dataset);

        CategoryPlot plot = chart.getCategoryPlot();

So as you can understand I must have to display full Time like 23 Feb'18 11:00:00 on the XAxis tilted to 45degrees which I am able to achieve using

CategoryAxis categoryAxis = chart.getCategoryPlot().getDomainAxis();
categoryAxis.setCategoryLabelPositions(CategoryLabelPositions.UP_45);

But I want to display my text on XAxis in 2 lines somewhat like:

23 Feb'18 
11:00:00

tilted to 45 degrees. For which I had tried using

CategoryAxis categoryAxis = chart.getCategoryPlot().getDomainAxis();         
categoryAxis.setCategoryLabelPositions(CategoryLabelPositions.UP_45);
categoryAxis.setMaximumCategoryLabelLines(5);

with no success so how can I achieve that??

score 0 · Accepted Answer · answered Mar 18 '19 at 10:02

After some self-research I found out that while reducing the width and height values of the JFreeChart Image through ChartUtilities.encodeAsPNG(chart.createBufferedImage(500, 300)); command that the text is getting auto-adjusted to new line.

So after some more research, I got this command that does the work for me. By Creating a Object of CategoryAxis along X-Axis so getDomainAxis() for Y-Axis it is getRangeAxis()

CategoryAxis domainAxis = chart.getCategoryPlot().getDomainAxis();
domainAxis.setMaximumCategoryLabelWidthRatio(0.25f);

then we use .setMaximumCategoryLabelWidthRatio(float ratio) and adjust it as per your requirement!!

How to render Date Values on X Axis of LineChart in 2 Lines using JFreeChart?

1 Answers1