How to replace from null value empty string in java? [closed]

Answer 1

If I understand correctly, you need this

public static String replaceNull(String input) {
  return input == null ? "" : input;
}

and the use it where ever you need it like

sheet.addCell(new Label(4,currentRow, replaceNull(a.getParan())+" "+replaceNull(a.getO())+" "+replaceNull(a.getParan())));

Hope this helps