### Question:
XLSXSample { public void makeXlsxFile() throws Exception { String fileName = "test.xlsx"; FileOutputStream fileOut = new FileOutputStream(fileName); Workbook wb = new XSSFWorkbook(); Sheet sheet = wb.createSheet("test"); Row row = sheet.createRow((short)0); Cell cell = row.createCell(0); cell.setCellValue("日本語は通る？"); wb.write(fileOut); fileOut.close(); }  void makeXlsxFile();  }### Answer:
@Test public void test() throws Exception { XLSXSample target = new XLSXSample(); target.makeXlsxFile(); }