How to modify stacked bar chart?(JFreeChart)

[ginger0001]

The output of this graph is stacked bar chart but it show number in stack and on the top most of the stack.
1. I want to keep the number in each stack but I want to delete the number at the top most
2. The top most position, I want to put other number that are in form of int not the total number of this stack
How can I modify this code, I am very new to java.

Thank you

import java.awt.Dimension;   
import javax.swing.JPanel;   
import org.jfree.chart.*;   
import org.jfree.chart.axis.NumberAxis;   
import org.jfree.chart.axis.ValueAxis;   
import org.jfree.chart.labels.StandardCategoryItemLabelGenerator;   
import org.jfree.chart.labels.StandardCategoryToolTipGenerator;   
import org.jfree.chart.plot.CategoryPlot;   
import org.jfree.chart.plot.PlotOrientation;   
import org.jfree.data.category.CategoryDataset;   
import org.jfree.data.category.DefaultCategoryDataset;   
import org.jfree.ui.ApplicationFrame;   
import org.jfree.ui.RefineryUtilities;   

import demo.ExtendedStackedBarRenderer;
   
// Referenced classes of package demo:   
//            ExtendedStackedBarRenderer   
   
public class StackDemo extends ApplicationFrame   
{   
   
    /**  
     *   
     */   
    private static final long serialVersionUID = 1L;   
   
    public StackDemo(String s)   
    {   
        super(s);   
        CategoryDataset categorydataset = createDataset();   
        JFreeChart jfreechart = createChart(categorydataset);   
        ChartPanel chartpanel = new ChartPanel(jfreechart);   
        chartpanel.setPreferredSize(new Dimension(500, 270));   
        setContentPane(chartpanel);   
    }   
   
    private static CategoryDataset createDataset()   
    {   
        DefaultCategoryDataset defaultcategorydataset = new DefaultCategoryDataset();   
        defaultcategorydataset.addValue(10, "Vacant", "Jan");   
        defaultcategorydataset.addValue(12, "Vacant", "Feb");   
        defaultcategorydataset.addValue(13, "Vacant", "Mar");   
        defaultcategorydataset.addValue(4, "Discount", "Jan");   
        defaultcategorydataset.addValue(3, "Discount", "Feb");   
        defaultcategorydataset.addValue(2, "Discount", "Mar");   
        defaultcategorydataset.addValue(2, "Regular", "Jan");   
        defaultcategorydataset.addValue(3, "Regular", "Feb");   
        defaultcategorydataset.addValue(2, "Regular", "Mar");   
         
        return defaultcategorydataset;   
    }   
   
    private static JFreeChart createChart(CategoryDataset categorydataset)   
    {   
        JFreeChart jfreechart = ChartFactory.createStackedBarChart("Stacked Bar Chart Demo 3", "Category", "Value", categorydataset, PlotOrientation.VERTICAL, true, false, false);   
        CategoryPlot categoryplot = jfreechart.getCategoryPlot();   
        ExtendedStackedBarRenderer extendedstackedbarrenderer = new ExtendedStackedBarRenderer();   
        extendedstackedbarrenderer.setItemLabelsVisible(true);   
        extendedstackedbarrenderer.setItemLabelGenerator(new StandardCategoryItemLabelGenerator());   
        extendedstackedbarrenderer.setToolTipGenerator(new StandardCategoryToolTipGenerator());   
        categoryplot.setRenderer(extendedstackedbarrenderer);   
        ValueAxis valueaxis = categoryplot.getRangeAxis();   
        valueaxis.setStandardTickUnits(NumberAxis.createIntegerTickUnits());   
        valueaxis.setLowerMargin(0.14999999999999999D);   
        valueaxis.setUpperMargin(0.14999999999999999D);   
        return jfreechart;   
    }   
   
    public static JPanel createDemoPanel()   
    {   
        JFreeChart jfreechart = createChart(createDataset());   
        return new ChartPanel(jfreechart);   
    }   
   
    public static void main(String args[])   
    {   
        StackDemo stackedbarchartdemo3 = new StackDemo("Stacked Bar Chart Demo 3");   
        stackedbarchartdemo3.pack();   
        RefineryUtilities.centerFrameOnScreen(stackedbarchartdemo3);   
        stackedbarchartdemo3.setVisible(true);   
    }   
}