Create Excel Chart in Java

The following example shows how to create an Excel chart in Java and select data for it using the GemBox.Spreadsheet for Java component.

Excel charts are supported only in XLSX.

To convert an existing workbook with charts into another file format, use Convert example.

For more information about charts, see the charts help page.

Chart Screenshot
import com.gembox.spreadsheet.*;
import com.gembox.spreadsheet.charts.*;

class Program {

    public static void main(String[] args) throws java.io.IOException {
        // If using Professional version, put your serial key below.
        SpreadsheetInfo.setLicense("FREE-LIMITED-KEY");

        ExcelFile ef = new ExcelFile();
        ExcelWorksheet ws = ef.addWorksheet("Chart");

        int numberOfEmployees = %EmployeesCount%;

        // Create Excel chart and select data for it.
        ExcelChart chart = ws.getCharts().add(ChartType.BAR, "D2", "M25");
        chart.selectData(ws.getCells().getSubrangeAbsolute(0, 0, numberOfEmployees, 1), true);

        // Add data which is used by the Excel chart.
        String[] names = new String[] { "John Doe", "Fred Nurk", "Hans Meier", "Ivan Horvat" };
        java.util.Random random = new java.util.Random();
        for (int i = 0; i < numberOfEmployees; i++) {
            ws.getCell(i + 1, 0).setValue(names[i % names.length] + (i < names.length ? "" : " " + (i / names.length + 1)));
            ws.getCell(i + 1, 1).setValue(random.nextInt(4000) + 1000);
        }

        // Set header row and formatting.
        ws.getCell(0, 0).setValue("Name");
        ws.getCell(0, 1).setValue("Salary");
        ws.getCell(0, 1).getStyle().getFont().setWeight(ExcelFont.BOLD_WEIGHT);
        ws.getCell(0, 0).getStyle().getFont().setWeight(ExcelFont.BOLD_WEIGHT);
        ws.getColumn(0).setWidth((int) LengthUnitConverter.convert(3, LengthUnit.CENTIMETER, LengthUnit.ZERO_CHARACTER_WIDTH_256_TH_PART));
        ws.getColumn(1).getStyle().setNumberFormat("\"$\"#,##0");

        ef.save("Chart.xlsx");
    }
}

Check next example or download examples from GitHub.