Replace number with name of months - jasper-reports

Question

I have sort of data which contains number.
1,2,3,4,5,6,7,8,9,10,11,12, to represent months.
I want to change it so when I preview the report it shows
January
February
March
April
May
June
July
August
November
December
I've tried using replace()
.replace("1", "January")
When I run it, it doesn't work
Any suggestion?

Answer 1

You can use Text Field Expression, Replace $V{Month} with your field Name
<textfieldexpression class="java.lang.String">
(
$V{Month}.equals("1") ? "January" :
$V{Month}.equals("2") ? "February" :
$V{Month}.equals("3") ? "March" :
$V{Month}.equals("4") ? "April" :
$V{Month}.equals("5") ? "May" :
$V{Month}.equals("6") ? "June" :
$V{Month}.equals("7") ? "July" :
$V{Month}.equals("8") ? "August" :
$V{Month}.equals("9") ? "September" :
$V{Month}.equals("10") ? "October" :
$V{Month}.equals("11") ? "November" : "December"
)
</textfieldexpression>

Answer 2

This should solve your problem. What I have done here is split the source string into an ArrayList of String and then used switch case to concatenate the names of corresponding months to a new string that is shown as the output.
import java.util.*;
class abc
{
public static void main (String[] args)
{
String str = "1,2,3,4,5,6,7,8,9,10,11,12,";
String res = "";
List<String> list = new ArrayList<String>(Arrays.asList(str.split(",")));
for (String s : list)
{
switch (s)
{
case "1":
res += "January\n";
break;
case "2":
res += "February\n";
break;
case "3":
res += "March\n";
break;
case "4":
res += "April\n";
break;
case "5":
res += "May\n";
break;
case "6":
res += "June\n";
break;
case "7":
res += "July\n";
break;
case "8":
res += "August\n";
break;
case "9":
res += "September\n";
break;
case "10":
res += "October\n";
break;
case "11":
res += "November\n";
break;
case "12":
res += "December\n";
break;
default:
System.err.println("Invalid output");
}
}
System.out.println(res);
}
}