Tag: Formula

Requirement – Setting styles on excel cells

Solutions– You can set FONT,Color, Bold etc.Use cell.setCellStyle(style) method.

Following is code for setting styles

HSSFWorkbook workbook = new HSSFWorkbook();
HSSFSheet sheet = workbook.createSheet("Style example");
<strong> //Example 1 of setting styles in cell</strong>
HSSFFont font = workbook.createFont();
font.setBoldweight(HSSFFont.BOLDWEIGHT_BOLD);
font.setFontName(HSSFFont.FONT_ARIAL); 
HSSFCellStyle style = workbook.createCellStyle();
style.setFont(font);
 
Row row = sheet.createRow(0);
Cell cell = row.createCell(0);
cell.setCellValue("Setting text in BOLD and in Arial font");
cell.setCellStyle(style);
 
<strong>  //Example 2 of setting styles in cell</strong>
font = workbook.createFont();
font .setItalic(true);  // setting cell value as italic
font setFontHeightInPoints((short) 12);   //setting font height.
font.setColor(HSSFColor.GREEN.index);  // setting color as green
style = workbook.createCellStyle();
style.setFont(font);
 
row = sheet.createRow(1);
cell = row.createCell(0);
cell.setCellValue("Setting text in italic & green");
cell.setCellStyle(style);
 
try {
    FileOutputStream out = new FileOutputStream(new File("C:\\Vinaystyle.xls"));
    workbook.write(out);
    out.close();
    System.out.println("Excel written successfully..");
     
} catch (FileNotFoundException e) {
    e.printStackTrace();
} catch (IOException e) {
    e.printStackTrace();
}

You can also set the background color for the rows as well in sheet

  // Aqua background
CellStyle style = wb.createCellStyle();
style.setFillBackgroundColor(IndexedColors.AQUA.getIndex());
style.setFillPattern(CellStyle.BIG_SPOTS);
row.setRowStyle(style);

Setting Formula in Excel –

    Row row= sheet.createRow(1);
    row.createCell(0).setCellValue(100);
    rpw.createCell(1).setCellValue(200);
    row.createCell(2).setCellValue(300);
    row.createCell(3).setCellFormula("SUM(A1:A4)");
  or 
    cell.setCellFormula("A2*B3*C4")
 

For evaluating formula you can use –

FormulaEvaluator evaluator = 
workbook.getCreationHelper().createFormulaEvaluator(); 

evaluateFormulaCell(Cell cell) will check to see if the supplied cell is a formula cell. If it isn’t, then no changes will be made to it. If it is, then the formula is evaluated. The value for the formula is saved alongside it, to be displayed in excel. The formula remains in the cell, just with a new value.

Happy coding with Vinay in techartifact