Kennywen
asked on
Change X-axis label's value in TimeSeries chart (jfreechart)
Sample code as below:
XYPlot plot = chart.getXYPlot();
DateAxis axis = (DateAxis) plot.getDomainAxis();
axis.setTickUnit(new DateTickUnit(DateTickUnit. HOUR, 1,new SimpleDateFormat("dd-MMM HH:mm")));
the above coding will display the dd-MMM HH:mm as my X-axis label. just wonder is there anyway to display the dd-MMM as X-axis label if the dd-MMM is enter to a new date.
thanks
XYPlot plot = chart.getXYPlot();
DateAxis axis = (DateAxis) plot.getDomainAxis();
axis.setTickUnit(new DateTickUnit(DateTickUnit.
the above coding will display the dd-MMM HH:mm as my X-axis label. just wonder is there anyway to display the dd-MMM as X-axis label if the dd-MMM is enter to a new date.
thanks
Do you want to change the display on some specific event or automatically, after a period of time? If so, you might need a separate thread and keep a timer.
ASKER
axis.setTickUnit(new DateTickUnit(DateTickUnit. HOUR, 1,new SimpleDateFormat("dd-MMM HH:mm")));
actually the above code will display the date and time on the X-axis label. E.g. 12-Apr 18:16, 12-Apr 19:16, 12-Apr 20:16, 12-Apr 21:16, 12-Apr 22:16 and so on. But i want to display the date only when the date is not exist recently on the X-axis label E.g. 12-Apr 18:16, 19:16, 20:16, 21:16, 22:16, 23:16, 13-Apr 00:16, 01:16 and so on. Any idea to doing above example?
thanks
actually the above code will display the date and time on the X-axis label. E.g. 12-Apr 18:16, 12-Apr 19:16, 12-Apr 20:16, 12-Apr 21:16, 12-Apr 22:16 and so on. But i want to display the date only when the date is not exist recently on the X-axis label E.g. 12-Apr 18:16, 19:16, 20:16, 21:16, 22:16, 23:16, 13-Apr 00:16, 01:16 and so on. Any idea to doing above example?
thanks
Perhaps you can display the date once and then use: new SimpleDateFormat ( "HH:mm" ) ) ) ;
ASKER
can you provide more code for me?
thanks
thanks
Just that:
>> axis.setTickUnit(new DateTickUnit(DateTickUnit. HOUR, 1,new SimpleDateFormat("dd-MMM HH:mm")));
would become:
axis.setTickUnit ( new DateTickUnit ( DateTickUnit.HOUR, 1, new SimpleDateFormat ( "HH:mm" ) ) ) ;
>> axis.setTickUnit(new DateTickUnit(DateTickUnit.
would become:
axis.setTickUnit ( new DateTickUnit ( DateTickUnit.HOUR, 1, new SimpleDateFormat ( "HH:mm" ) ) ) ;
ASKER
>> axis.setTickUnit ( new DateTickUnit ( DateTickUnit.HOUR, 1, new SimpleDateFormat ( "HH:mm" ) ) ) ;
this will display the HH:mm as the X-axis label. but i want to display the date also when it's a new date.
this will display the HH:mm as the X-axis label. but i want to display the date also when it's a new date.
Do you have some method/ means for reading the contents which have been displayed? If so, then it might be solved.
ASKER
Currently i don't have any solution yet because:
>> axis.setTickUnit ( new DateTickUnit ( DateTickUnit.HOUR, 1, new SimpleDateFormat ( "HH:mm" ) ) ) ;
will set the HH:mm as the X-axis label and
>> axis.setTickUnit ( new DateTickUnit ( DateTickUnit.HOUR, 1, new SimpleDateFormat ( "dd:MMM" ) ) ) ;
will set the dd:MMM as the X-axis label
so how can i display the dd:MMM when it's a new day (E.g. 13 - Apr, 14 - Apr and so on) but display the HH:mm as the X-axis label
E.g.
12-Apr 18:16, 19:16, 20:16, 21:16, 22:16, 23:16, 13-Apr 00:16, 01:16
>> axis.setTickUnit ( new DateTickUnit ( DateTickUnit.HOUR, 1, new SimpleDateFormat ( "HH:mm" ) ) ) ;
will set the HH:mm as the X-axis label and
>> axis.setTickUnit ( new DateTickUnit ( DateTickUnit.HOUR, 1, new SimpleDateFormat ( "dd:MMM" ) ) ) ;
will set the dd:MMM as the X-axis label
so how can i display the dd:MMM when it's a new day (E.g. 13 - Apr, 14 - Apr and so on) but display the HH:mm as the X-axis label
E.g.
12-Apr 18:16, 19:16, 20:16, 21:16, 22:16, 23:16, 13-Apr 00:16, 01:16
Try this:
Calendar cal = Calendar.getInstance () ;
String format = ( cal.get ( Calendar.HOUR ) == 0 && cal.get ( Calendar.MINUTE ) == 0 ) ? "dd-MMM HH:mm" : "HH:mm" ;
axis.setTickUnit ( new DateTickUnit ( DateTickUnit.HOUR, 1, new SimpleDateFormat ( format ) ) ) ;
Calendar cal = Calendar.getInstance () ;
String format = ( cal.get ( Calendar.HOUR ) == 0 && cal.get ( Calendar.MINUTE ) == 0 ) ? "dd-MMM HH:mm" : "HH:mm" ;
axis.setTickUnit ( new DateTickUnit ( DateTickUnit.HOUR, 1, new SimpleDateFormat ( format ) ) ) ;
ASKER
tested and it display the HH:mm as my X-axis label. But the date is not appear in the x-axis.
It will display a new date when a new day will start. Set your system time to something like 23:59 and see if it prints the date when a new date starts.
ASKER
X-axis label is depend on my database's data and one of my database column is the date.
ASKER CERTIFIED SOLUTION
membership
This solution is only available to members.
To access this solution, you must be a member of Experts Exchange.