Represents a range of characters within the cell text.
Example:
//Instantiating a Workbook object
Workbook workbook = new Workbook();
//Adding a new worksheet to the Excel object
workbook.getWorksheets().add();
//Obtaining the reference of the newly added worksheet by passing its sheet index
Worksheet worksheet = workbook.getWorksheets().get(0);
//Accessing the "A1" cell from the worksheet
Cell cell = worksheet.getCells().get("A1");
//Adding some value to the "A1" cell
cell.putValue("Visit Aspose!");
//getting charactor
FontSetting charactor = cell.characters(6, 7);
//Setting the font of selected characters to bold
charactor.getFont().setBold(true);
//Setting the font color of selected characters to blue
charactor.getFont().setColor(Color.getBlue());
//Saving the Excel file
workbook.save("D:\\book1.xls");