Bael 5200 numeric excel (#11594)

* Changes for Numeric Format

* Update NumberCellValueUnitTest.java

* Corrected the workbook format

* Unwanted change removed

* Corrected the spell issue

* Update NumberCellValueUnitTest.java

* Fixed review comment

* Update NumberCellValueUnitTest.java

apache-poi-2/src/main/java/com/baeldung/poi/excel/newcolumn/numeric/ExcelNumericFormat.java

@@ -0,0 +1,19 @@
+package com.baeldung.poi.excel.newcolumn.numeric;
+
+import org.apache.poi.ss.usermodel.Cell;
+import org.apache.poi.ss.usermodel.CellStyle;
+import org.apache.poi.ss.usermodel.DataFormat;
+import org.apache.poi.ss.usermodel.Row;
+import org.apache.poi.ss.usermodel.Workbook;
+
+public class ExcelNumericFormat {
+
+    public static void applyNumericFormat(Workbook outWorkbook, Row row, Cell cell, Double value, String styleFormat) {
+        CellStyle style = outWorkbook.createCellStyle();
+        DataFormat format = outWorkbook.createDataFormat();
+        style.setDataFormat(format.getFormat(styleFormat));
+        cell.setCellValue(value);
+        cell.setCellStyle(style);
+    }
+
+}

apache-poi-2/src/test/java/com/baeldung/poi/excel/newcolumn/numeric/NumberCellValueUnitTest.java

@@ -0,0 +1,105 @@
+package com.baeldung.poi.excel.newcolumn.numeric;
+
+import org.apache.poi.hssf.usermodel.HSSFWorkbook;
+import org.apache.poi.ss.usermodel.Cell;
+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.xssf.usermodel.XSSFWorkbook;
+import org.junit.Test;
+import org.junit.jupiter.api.Assertions;
+
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.FileOutputStream;
+import java.io.IOException;
+import java.text.DecimalFormat;
+
+public class NumberCellValueUnitTest {
+
+    @Test
+    public void decimalDisplay_whenAddedDouble_thenNumericCellCreated() throws IOException {
+        File file = new File("number_test.xlsx");
+        try (Workbook outWorkbook = new XSSFWorkbook()) {
+            Sheet sheet = outWorkbook.createSheet("Numeric Sheet");
+            Row row = sheet.createRow(0);
+            Cell cell = row.createCell(0);
+            ExcelNumericFormat.applyNumericFormat(outWorkbook, row, cell, 10.251, "0.00");
+            FileOutputStream fileOut = new FileOutputStream(file);
+            outWorkbook.write(fileOut);
+            fileOut.close();
+        }
+        try (Workbook inWorkbook = new XSSFWorkbook("number_test.xlsx")) {
+            Sheet sheet = inWorkbook.cloneSheet(0);
+            Row row = sheet.getRow(0);
+            Assertions.assertEquals(10.251, row.getCell(0)
+                .getNumericCellValue());
+            file.delete();
+        }
+    }
+
+    @Test
+    public void decimalRoundedDisplay_whenAddedDouble_thenNumericCellCreated() throws IOException {
+        File file = new File("number_test.xlsx");
+        try (Workbook outWorkbook = new XSSFWorkbook()) {
+            Sheet sheet = outWorkbook.createSheet("Numeric Sheet");
+            Row row = sheet.createRow(0);
+            Cell cell = row.createCell(0);
+            ExcelNumericFormat.applyNumericFormat(outWorkbook, row, cell, 10.251123, "#,##0.0000");
+            FileOutputStream fileOut = new FileOutputStream(file);
+            outWorkbook.write(fileOut);
+            fileOut.close();
+        }
+        try (Workbook inWorkbook = new XSSFWorkbook("number_test.xlsx")) {
+            Sheet sheet = inWorkbook.cloneSheet(0);
+            Row row = sheet.getRow(0);
+            Assertions.assertEquals(10.251123, row.getCell(0)
+                .getNumericCellValue());
+            file.delete();
+        }
+    }
+
+    @Test
+    public void decimalDisplayInXLS_whenAddedDouble_thenNumericCellCreated() throws IOException {
+        File file = new File("number_test.xls");
+        try (Workbook outWorkbook = new HSSFWorkbook()) {
+            Sheet sheet = outWorkbook.createSheet("Numeric Sheet");
+            Row row = sheet.createRow(0);
+            Cell cell = row.createCell(0);
+            ExcelNumericFormat.applyNumericFormat(outWorkbook, row, cell, 10.251, "0.00");
+            FileOutputStream fileOut = new FileOutputStream(file);
+            outWorkbook.write(fileOut);
+            fileOut.close();
+        }
+        try (Workbook inWorkbook = new HSSFWorkbook(new FileInputStream(file))) {
+            Sheet sheet = inWorkbook.cloneSheet(0);
+            Row row = sheet.getRow(0);
+            Assertions.assertEquals(10.251, row.getCell(0)
+                .getNumericCellValue());
+            file.delete();
+        }
+    }
+
+    @Test
+    public void decimalValue_whenAddedDouble_thenNumericCellCreated() throws IOException {
+        File file = new File("number_test.xlsx");
+        try (Workbook outWorkbook = new XSSFWorkbook()) {
+            Sheet sheet = outWorkbook.createSheet("Numeric Sheet");
+            Row row = sheet.createRow(0);
+            Cell cell = row.createCell(0);
+            DecimalFormat df = new DecimalFormat("#,###.##");
+            ExcelNumericFormat.applyNumericFormat(outWorkbook, row, cell, Double.valueOf(df.format(10.251)), "#,###.##");
+
+            FileOutputStream fileOut = new FileOutputStream(file);
+            outWorkbook.write(fileOut);
+            fileOut.close();
+        }
+        try (Workbook inWorkbook = new XSSFWorkbook("number_test.xlsx")) {
+            Sheet sheet = inWorkbook.cloneSheet(0);
+            Row row = sheet.getRow(0);
+            Assertions.assertEquals(10.25, row.getCell(0)
+                .getNumericCellValue());
+            file.delete();
+        }
+    }
+}

apache-poi/src/main/java/com/baeldung/poi/excel/multilinetext/MultilineText.java

@@ -2,7 +2,6 @@ package com.baeldung.poi.excel.multilinetext;
 
 import org.apache.poi.ss.usermodel.Cell;
 import org.apache.poi.ss.usermodel.CellStyle;
-import org.apache.poi.ss.usermodel.Row;
 
 public class MultilineText {
     public void formatMultilineText(Cell cell, int cellNumber) {