Message Mapping - Identify a number in a sting

Question

Hello Guys,
                      There is a requirement to perform a conversion based on its length.
If the length of the incoming field is less than or equal to 20 characters pass the string directly to the target field.
If the length is more than 20 then find the number of excess characters and remove that many number of characters from the string before the first occuranace of number in the string to make the total length as 20 chars.
As an example, lets say if I have a string with a length of 22 like this " I have 4 books at home"
In the string 2 chars have to be removed before the number 4,  so that it has to look like "i hav4 books at home" which of length 20 char.
Some more examples :
"I have 14 keys and 1 pen" should be converted to "I h14 keys and 1 pen" (4 excess chars "ave " has been removed)
Have used this UDF and many combinations but that didn't work :
public String test2(String STREET1,Container container){  //STREET1 is the incoming field
int input = STREET1.length();
int Length = 30;
int a,b,c;
int Loc = -1;
String str = "";
String str1, str2 = "";
if(input<=30)
         str = STREET1;
//else
        for (int i = 0; i < STREET1.length(); i++)
                 if (Character.isDigit(STREET1.charAt(i)))
                           Loc = i;
         // No digit found, so truncate to 30 length streetStr
         if (Loc == -1)
               str = STREET1;
          // Digit found
        else
                       a = input - Length;
                        b = Loc - a;
     c = input - Loc;
     str1 = STREET1.substring(0,b-2);
     str2 = STREET1.substring(Loc,c);
     str = str1" "str2;
return str;
Please correct the code or provide a workaround.... Thanks

Answer 1

Hello,
this should be your code. I make a test with "I have 14 keys and 1 pen" and my result is "I h14 keys and 1 pen".
Regards, Björn
int input = text.length();
int Length = 20;
int a,b,c;
int Loc = -1;
String str = "";
String str1, str2 = "";
if(input<=Length)
  str = text;
  return str;
for (int i = 0; i < text.length(); i++)
     if (Character.isDigit(text.charAt(i)))
          Loc = i;
          break;
// No digit found, so truncate to 30 length streetStr
if (Loc == -1)
     str = text.substring(0,Length);
}else
     a = input - Length;
     b = Loc - a;
     c = Length - Loc;
     str1 = text.substring(0,b);
     str2 = text.substring(Loc,input);
     str = str1""str2;
return str;