import com.sun.star.uno.UnoRuntime;
import com.sun.star.uno.AnyConverter;
import com.sun.star.uno.Type;
import com.sun.star.lang.XComponent;
import com.sun.star.lang.XMultiServiceFactory;
import com.sun.star.frame.XComponentLoader;
import com.sun.star.document.XEmbeddedObjectSupplier;
import com.sun.star.awt.ActionEvent;
import com.sun.star.awt.Rectangle;
import com.sun.star.beans.XPropertySet;
import com.sun.star.beans.PropertyValue;

import com.sun.star.container.*;
import com.sun.star.chart.*;
import com.sun.star.table.*;
import com.sun.star.sheet.*;

import com.sun.star.script.provider.XScriptContext;

createSpreadsheet()
{
    loader = (XComponentLoader)
        UnoRuntime.queryInterface(
            XComponentLoader.class, XSCRIPTCONTEXT.getDesktop());

    comp = loader.loadComponentFromURL(
        "private:factory/scalc", "_blank", 4, new PropertyValue[0]);

    doc = (XSpreadsheetDocument)
        UnoRuntime.queryInterface(XSpreadsheetDocument.class, comp);

    index = (XIndexAccess)
        UnoRuntime.queryInterface(XIndexAccess.class, doc.getSheets());

    sheet = (XSpreadsheet) AnyConverter.toObject(
        new Type(com.sun.star.sheet.XSpreadsheet.class), index.getByIndex(0));

    return sheet;
}

addData(sheet, date, total, free)
{
    // set the labels
    sheet.getCellByPosition(0, 0).setFormula("Used");
    sheet.getCellByPosition(0, 1).setFormula("Free");
    sheet.getCellByPosition(0, 2).setFormula("Total");

    // set the values in the cells
    sheet.getCellByPosition(1, 0).setValue(total - free);
    sheet.getCellByPosition(1, 1).setValue(free);
    sheet.getCellByPosition(1, 2).setValue(total);
}

addChart(sheet)
{
    rect = new Rectangle();
    rect.X = 500;
    rect.Y = 3000;
    rect.Width = 10000;
    rect.Height = 8000;

    range = (XCellRange) UnoRuntime.queryInterface(XCellRange.class, sheet);
    myRange = range.getCellRangeByName("A1:B2");

    rangeAddr = (XCellRangeAddressable)
        UnoRuntime.queryInterface(XCellRangeAddressable.class, myRange);

    myAddr = rangeAddr.getRangeAddress();

    CellRangeAddress[] addr = new CellRangeAddress[1];
    addr[0] = myAddr;

    supp = (XTableChartsSupplier)
        UnoRuntime.queryInterface( XTableChartsSupplier.class, sheet);
    charts = supp.getCharts();
    charts.addNewByName("Example", rect, addr, false, true);

    try { Thread.sleep(3000); } catch (java.lang.InterruptedException e) { }

    // get the diagram and Change some of the properties
    chartsAccess = (XNameAccess)
        UnoRuntime.queryInterface( XNameAccess.class, charts);

    tchart = (XTableChart)
        UnoRuntime.queryInterface(
            XTableChart.class, chartsAccess.getByName("Example"));

    eos = (XEmbeddedObjectSupplier)
        UnoRuntime.queryInterface( XEmbeddedObjectSupplier.class, tchart );
    xifc = eos.getEmbeddedObject();

    xChart = (XChartDocument)
        UnoRuntime.queryInterface(XChartDocument.class, xifc);

    xDocMSF = (XMultiServiceFactory)
        UnoRuntime.queryInterface(XMultiServiceFactory.class, xChart);

    diagObject = xDocMSF.createInstance("com.sun.star.chart.PieDiagram");
    xDiagram = (XDiagram)
        UnoRuntime.queryInterface(XDiagram.class, diagObject);
    xChart.setDiagram(xDiagram);

    propset = (XPropertySet)
        UnoRuntime.queryInterface( XPropertySet.class, xChart.getTitle() );
    propset.setPropertyValue("String", "JVM Memory Usage");
}

runtime = Runtime.getRuntime();
generator = new Random();
date = new Date();

// allocate a random number of bytes so that the data changes
len = (int)(generator.nextFloat() * runtime.freeMemory() / 5);
bytes = new byte[len];

sheet = createSpreadsheet();
addData(sheet, date.toString(), runtime.totalMemory(), runtime.freeMemory());
addChart(sheet);

return 0;