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How to set uneven (space) tick Units in JFreeChart XYLine

I've trying to find a solution to this problem.
I have an XYLineChart and I would like to have uneven spaces between tick units.
This is my code:
//Method (receive the dataset and return the chart)
private JFreeChart createChart(XYDataset dataset){
//--------create XYlineChart
JFreeChart oChart = ChartFactory.createXYLineChart("XYLineChart", "X", "Y", dataset);
XYPlot plot = (XYPlot) oChart.getPlot();
plot.setOrientation(PlotOrientation.VERTICAL);
plot.setRangeAxisLocation(AxisLocation.BOTTOM_OR_LEFT);
plot.setBackgroundPaint(Color.WHITE);
plot.setDomainGridlinesVisible(true);
plot.setDomainGridlinePaint(Color.black);
plot.setRangeGridlinePaint(Color.black);
// render shapes and lines
XYLineAndShapeRenderer renderer = new XYLineAndShapeRenderer(true, true);
plot.setRenderer(renderer);
renderer.setBaseShapesVisible(true);
renderer.setBaseShapesFilled(true);
NumberAxis yAxis = (NumberAxis) plot.getRangeAxis();
NumberAxis xAxis = (NumberAxis) plot.getDomainAxis();
xAxis.setNumberFormatOverride(THOUSANDS); //Override and Use a my NumberFormat
xAxis.setRange(0, 8000);
//I want to use this with my own set of tickUnits, the values(x) that are on the image I'm trying to achieve
//xAxis.setStandardTickUnits();
xAxis.setTickUnit(new NumberTickUnit(500));
yAxis.setRange(0.0, 130.0);
yAxis.setTickUnit(new NumberTickUnit(10));
yAxis.setInverted(true);
return oChart;
}
I dont know how to make my own set of TickUnits or how to space the domainAxis (xAxis) unevenly.
I'll be glad to read any examples of something like that, so i can try to use it or apply it.
I'll really appreciate your help, is the only thing missing in my project.

How to show shapes at plot points with JFreeChart TimeSeries chart?

I'm using JFreeChart v1.0.19 to create the following time series chart:
...using the following code:
final String chartTitle = "";
final XYDataset dataset = createDataset1();
final JFreeChart chart = ChartFactory.createTimeSeriesChart(
chartTitle, "Year End", "Turnover", dataset, true, false, false);
final XYPlot plot = chart.getXYPlot();
final NumberAxis axis2 = new NumberAxis("Cash");
axis2.setAutoRangeIncludesZero(false);
plot.setRangeAxis(1, axis2);
plot.setDataset(1, createDataset2());
plot.mapDatasetToRangeAxis(1, 1);
final StandardXYItemRenderer renderer1 = new StandardXYItemRenderer();
renderer1.setSeriesPaint(0, Color.blue);
renderer1.setSeriesShape(0, ShapeUtilities.createDiamond(5));
renderer1.setSeriesShapesFilled(0, true);
plot.setRenderer(0, renderer1);
final StandardXYItemRenderer renderer2 = new StandardXYItemRenderer();
renderer2.setSeriesPaint(0, Color.black);
renderer2.setSeriesShape(0, ShapeUtilities.createDiamond(5));
renderer2.setSeriesShapesFilled(0, true);
plot.setRenderer(1, renderer2);
chart.getPlot().setBackgroundPaint(Color.WHITE);
chart.getXYPlot().setDomainGridlinePaint(Color.LIGHT_GRAY);
chart.getXYPlot().setRangeGridlinePaint(Color.LIGHT_GRAY);
...but I can't get the data points to show shapes. Is this possible?

It was my renderer that was the problem. Changing from StandardXYItemRenderer to XYLineAndShapeRenderer e.g.
XYLineAndShapeRenderer renderer = new XYLineAndShapeRenderer(true,true);
...did the trick. The two boolean args in the constructor are for switching on/off lines and shapes, respectively.

Java JFreeChart Category Step Chart horizontal (image to explane)

i need the following type of chart:
It should be a "steped" line chart with categories on the vertical axis, like this:
I found this example of an Category Step Chart, but it the orientation is not right for my purpose.
http://www.jfree.org/jfreechart/api/javadoc/org/jfree/chart/renderer/category/CategoryStepRenderer.html
All i have done so far is this, but as you can see the red line does not fit to the orientation of the chart(should be horizontal):
The corresponding code to this:
DefaultCategoryDataset ds = new DefaultCategoryDataset();
// create dataset
for (int k = 0; k < ffCount; k++) {
StateSignal ss1 = (StateSignal) this.ffDSet.getFframes().get(k).getSignals().get(i);
ds.setValue((double) k + 1, ss1.getName(), ss1.getStates().get(0).getStatus());
}
CategoryStepRenderer categorysteprenderer = new CategoryStepRenderer(false);
categorysteprenderer.setBaseToolTipGenerator(new StandardCategoryToolTipGenerator());
CategoryAxis categoryaxis = new CategoryAxis("Category");
NumberAxis numberaxis = new NumberAxis("Value");
CategoryPlot categoryplot = new CategoryPlot(ds, categoryaxis, numberaxis, categorysteprenderer);
categoryplot.setRangePannable(true);
categoryplot.setOrientation(PlotOrientation.HORIZONTAL);
chart = new JFreeChart("test", null, categoryplot, true);
I don´t get it to work. Any ideas?
Thanks in advance!

It looks like you need to use a standard XYLineChart with a XYStepRenderer and a SymbolAxis to replace the default Range Axis rather than a CategoryStepRenderer and a horizontal plot orientation
If you associate Status A and B with a numerical value say 1 and 2 you can create a chart like this:
Using this a XYStepRenderer
XYStepRenderer renderer = new XYStepRenderer();
renderer.setBaseShapesVisible(true);
renderer.setSeriesStroke(0, new BasicStroke(2.0f));
renderer.setSeriesStroke(1, new BasicStroke(2.0f));
renderer.setBaseToolTipGenerator(new StandardXYToolTipGenerator());
renderer.setDefaultEntityRadius(6);
plot.setRenderer(renderer);
and a Symbol Axis
String[] grade = new String[3];
grade[0] = "";
grade[1] = "Status A";
grade[2] = "Status B";
SymbolAxis rangeAxis = new SymbolAxis("", grade);
rangeAxis.setTickUnit(new NumberTickUnit(1));
rangeAxis.setRange(0,3);
plot.setRangeAxis(rangeAxis);
In this example the SymbolAxis provides an alternative label for each value in the Axis

Date Chart in aChartEngine

I have edited my question...
Here is the code I am using, I am adding weight of an animal with time.
else if (str.equals("Weight"))
{
mDbHelper.open();
wtArray = mDbHelper.getWeight();
mDbHelper.close();
TimeSeries diaSeries = new TimeSeries("Weight");
for ( int i =0; i <wtArray.size(); i++)
{
Weight wt = wtArray.get(i);
diaSeries.add(wt.date, wt.weight);
}
XYMultipleSeriesDataset dataset = new XYMultipleSeriesDataset();
dataset.addSeries(diaSeries);
XYMultipleSeriesRenderer mrenderer = new XYMultipleSeriesRenderer();
XYSeriesRenderer renderer = new XYSeriesRenderer();
renderer.setColor(Color.RED);
renderer.setPointStyle(PointStyle.DIAMOND);
renderer.setFillPoints(true);
mrenderer.addSeriesRenderer(renderer);
graphLayout.addView(ChartFactory.getTimeChartView(this, dataset, mrenderer, "MM/dd/yyyy"));
}
It never shows any value on x axis, i-e time. I am using LinearLayout. Kindly tell me what is wrong. Also no Graph line is showing.
Secondly, What If I want to show data from specific date to another date?

You have two options here:
You keep using a LineChart and add custom labels while disabling the regular ones:
renderer.setXLabels(0);
renderer.addXTextLabel(date.getTime(), "Label");
You use a TimeChart which is a LineChart displaying time values using a format provided by you, instead of the LineChart.

umar.
Check my following code. I use a TimeChart here.
XYMultipleSeriesRenderer renderer = buildRenderer(colors, styles);
// mDateFrom and mDateTo are Date Objects
// Set the date span here
setChartSettings(renderer, "title", "x_tiele", "y_title",
mDateFrom.getTime(),
mDateTo.getTime(), 0, 1, Color.GRAY, Color.LTGRAY);
XYMultipleSeriesDataset dataset = buildDateDataset(titles, mHashMapGroupedEntites);
return ChartFactory.getTimeChartView(context, dataset,
renderer, "yyyy/MM/dd HH"+":00:00");
Try this.
XYMultipleSeriesDataset dataset = new XYMultipleSeriesDataset();
dataset.addSeries(diaSeries);
XYMultipleSeriesRenderer mrenderer = new XYMultipleSeriesRenderer();
mrenderer.setXAxisMin(YOUR_DATE_MIN);
mrenderer.setXAxisMax(YOUR_DATE_MAX);
// XYSeriesRenderer renderer = new XYSeriesRenderer();
mrenderer.setColor(Color.RED);
mrenderer.setPointStyle(PointStyle.DIAMOND);
mrenderer.setFillPoints(true);
// mrenderer.addSeriesRenderer(renderer);
graphLayout.addView(ChartFactory.getTimeChartView(this, dataset, mrenderer, "MM/dd/yyyy"));

Display X Values on the XYLineChart

I want to display the X values on to the XY line chart As shown below:
How can i do this?
I want to display it like this:
Here's my code to display the line Graph:
public class LineChartDemo6{
public static void main(String arg[]){
XYSeries series = new XYSeries("Average Weight");
series.add(20.0, 20.0);
series.add(40.0, 20.0);
series.add(55.0, 20.0);
series.add(70.0, 20.0);
XYDataset xyDataset = new XYSeriesCollection(series);
JFreeChart chart = ChartFactory.createXYLineChart
("XYLine Chart using JFreeChart", "Age", "Weight",
xyDataset, PlotOrientation.VERTICAL, true, true, false);
ChartFrame frame1=new ChartFrame("XYLine Chart",chart);
frame1.setVisible(true);
frame1.setSize(300,300);
}
}

You can add an XYItemLabelGenerator to your plot's renderer, as shown in this example and this example. It looks like ArgumentIndex {1} is the domain value.
Addendum: Your example works fine; it just needs a little extra margin.
ValueAxis range = plot.getRangeAxis();
range.setUpperMargin(0.20);