Inserting non-numerical characters into tick labels

[tox0tes]

I have an XYLineChart that displays time in HHh MM' SS" .... however I cannot figure out how to have this displayed since the XYLineChart only takes numbers as tick labels.

[RichardWest]

Use a DateAxis for the domain axis. If you want to specify how the axis labels are formatted, create a custom DataFormat and assign it with setDateFormatOverride(java.text.DateFormat). The JavaDoc entries and the internet should be able to fill in the rest of the details.

[tox0tes]

Code: Select all

Caused by: java.lang.ClassCastException: org.jfree.chart.axis.NumberAxis
[17:18:40.423] {http--8080-2} 	at java:167)

this is line 167:

Code: Select all

DateAxis domainAxis = (DateAxis) plot.getDomainAxis(); 

Richard, can I pay you $40 to write me sample code that simply displays a number representing milliseconds (472832837) and displays it as HHh MM' SS" on an axis? I have asked similar questions multiple times and get the same response: "look on the internet, search the forum, etc..." but there is no resource on the internet that talks about this. I have battling this problem for 2 months and I give up.

[RichardWest]

Richard, can I pay you $40 to write me sample code that simply displays a number representing milliseconds (472832837) and displays it as HHh MM' SS" on an axis?

As much as I appreciate the offer of $40, I will have to decline. I do have a few minutes, so I gave this a quick look. Try the following:

Code: Select all

import java.text.SimpleDateFormat

DateAxis domainAxis = new DateAxis("time");
domainAxis.setDateFormatOverride(new SimpleDateFormat("HH'h' mm'' ss'"'"));

plot.setDomainAxis(domainAxis);

I believe the pattern is correct for what you desire. You may or may not have to escape the double-quote for the seconds (I suspect you do). If you want to understand what this is doing, take a look at the SimpleDateFormat class.

I have asked similar questions multiple times and get the same response: "look on the internet, search the forum, etc..." but there is no resource on the internet that talks about this. I have battling this problem for 2 months and I give up.

You have to understand that the forum is run by volunteers and only a few members of the forum are active participants with respect to answering posts. My participation in the forum varies wildly with the amount of work I have to complete for my employer (AMD). The most I can spare is to point someone in the correct direction and hope that they have the general skills and/or knowledge to go from there. JFreeChart is a project intended for developers with a good understanding of Java (or programming in general). A certain amount of self-reliance is expected, but I admit it can be irritating at times.

[RichardWest]

As an FYI, David Gilbert does offer support contracts for JFreeChart. I do not know what his fees are, but I am sure you can disuss the details with him via email. Unlike myself, he actually works for Object Refinery Limited and does consulting for a business.

[tox0tes]

Thanks Richard, that code did it! That just made my day.

[RichardWest]

Thanks Richard, that code did it! That just made my day.

You are welcome. If you still feel like paying $40 for the answer, write a check in that amount to the charity of your choice. I think that would be a fair exchange.

[david.gilbert]

You are welcome. If you still feel like paying $40 for the answer, write a check in that amount to the charity of your choice. I think that would be a fair exchange.

Richard, thank you very much for the generosity you've displayed here. I really really appreciate the contribution you've made in the JFreeChart forum (not to mention the codebase!) over the last few years. I can hardly offer you a "fair exchange" in return, but at least I can make a gesture - so just now I donated GBP50 (about US$90) to WaterAid on your behalf:

http://www.wateraid.org/

Thanks!

Dave Gilbert
JFreeChart Project Leader

[RichardWest]

David,
Thank you for your kind words and generous contribution.