How do I change the Text Color and the Fillcolor

Question

How do I change the header font color to white and the fill green? These are the classes that I am using:

import static org.apache.poi.ss.usermodel.CellStyle.*
import static org.apache.poi.ss.usermodel.IndexedColors.*
import org.apache.poi.hssf.usermodel.*
import org.apache.poi.hssf.usermodel.HSSFWorkbook
import org.apache.poi.ss.usermodel.Cell
import org.apache.poi.ss.usermodel.CellStyle
import org.apache.poi.ss.usermodel.Row
import org.apache.poi.ss.usermodel.Sheet
import org.apache.poi.ss.usermodel.Workbook
import org.apache.poi.ss.usermodel.Font

And this is the code where, I believe, it will have to be inserted into.

Font headerFont = wb.createFont();
headerFont.setBoldweight(Font.BOLDWEIGHT_BOLD)
CellStyle headerStyle = wb.createCellStyle()
headerStyle.setFont(headerFont)

cellMOPID.setCellStyle(headerStyle)
cellType.setCellStyle(headerStyle)
cellStatus.setCellStyle(headerStyle)
cellState.setCellStyle(headerStyle)
cellStartDate.setCellStyle(headerStyle)
cellEndDate.setCellStyle(headerStyle)
cellDesc.setCellStyle(headerStyle)

Answer 1

If you want to set the color as simple cellstyle... you can write code like.

 cell.setCellValue("Header Text");
 XSSFCellStyle headerStyle = wb.createCellStyle();
 Font headerFont = wb.createFont();
 headerStyle.setFillForegroundColor(IndexedColors.GREEN.getIndex());
 headerFont.setColor(IndexedColors.WHITE.getIndex());
 headerStyle.setFillPattern(CellStyle.SOLID_FOREGROUND);
 headerStyle.setFont(headerFont);
 cell.setCellStyle(headerStyle);

This will fill the cell with GREEN color and the font will be of Bold WHITE color

Answer 2

     HSSFCellStyle cellStyle = workBook.createCellStyle();        
     HSSFFont font = wb.createFont();
     font.setFontName(XSSFFont.DEFAULT_FONT_NAME);
     font.setFontHeightInPoints((short)10);
     font.setColor(IndexedColors.BLUE.getIndex());
     cellStyle.setFont(font);
    //the version i am using is poi-3.8

Answer 3

For xls file I have checked the following and is working fine on my end.

I need to import following:

import java.io.FileInputStream;
import java.io.FileOutputStream;
import org.apache.poi.hssf.usermodel.HSSFCell;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.apache.poi.ss.usermodel.CellStyle;
import org.apache.poi.ss.usermodel.Font;
import org.apache.poi.ss.usermodel.IndexedColors;

and the piece of code is following:

    FileInputStream fin = new FileInputStream (XLSFileAddress);
    HSSFWorkbook wb = new HSSFWorkbook(fin);
    HSSFCell cell=wb.getSheetAt(2).getRow(0).getCell(0);
    cell.setCellValue("Header Text");
    Font headerFont = wb.createFont();
    headerFont.setBoldweight(Font.BOLDWEIGHT_BOLD);
    CellStyle headerStyle = wb.createCellStyle();
    headerStyle.setFont(headerFont);
    headerStyle.setFillForegroundColor(IndexedColors.GREEN.getIndex());
    headerFont.setColor(IndexedColors.WHITE.getIndex());
    headerStyle.setFillPattern(CellStyle.SOLID_FOREGROUND);
    cell.setCellStyle(headerStyle);
    FileOutputStream fileOut = new FileOutputStream(XLSFileAddress);
    wb.write(fileOut);
    fileOut.close();

The output of this code is the first cell of first Row of sheet at index two, will show the text "Header Text" with cell color as Green and Text Color is White with Bold Font.

I am using apache POI 3.9.