Java String regex replace

Question

My string structure is following

characters 1-3 are uppercase alphabets including diacritics such Ň Ö Ï

Characters 4-7 will always be numbers.

8th is space

9th is forward slash

10th space

11th onwards are number.

String str1 = "DIW785o / 42"; // expected result "DIW7850 / 42"
String str2 = "QLR357Ï / 11"; // expected result "QLR3571 / 11"
String str3 = "UÜÈ7477 / 00"; // expected result "UÜÈ7477 / 00"
String str4 = "A / P8538 / 28"; // expected result "AÏP8538 / 28"
String str5 = "CV0875Z / 01"; // expected result "CVO8752 / 01"
String str6 = "SW / 2188 / 38"; // expected result "SWÏ2188 / 38"

I wanted replace first 3 characters such as

replaceAll("[2]", "Z")
.replaceAll("[0]", "O")
.replaceAll("[5]", "S")
.replaceAll(" // ","Ï) // replace space forward_slash space with Ï

and position where numbers with following

 .replaceAll("(?i)L|(?i)I", "1")
 .replaceAll("(?i)o", "0")
 .replaceAll("(?i)s", "5")
 .replaceAll("(?i)z", "2") 

• vks: Can you post some examples.It's unclear as of now what you want and what u tried
• Jon Thoms: I don't quite understand what your question is.
• AGdev: I added input string and their expected results
• Bahramdun Adil: Show us the string which you want to regex on it
• Moishe Lipsker: something like \p{Lu} might help you with uppercase latin letters. See regular-expressions.info/unicode.html

Answer 1

I'd say its easier without regex, since you want to replace Strings, but only when they are at certain Positions:

Check, if / is somwere in the first 7 chars, and replace it with Ï:

if(input.indexOf(" / ") < 7 ){
 input = input.replaceFirst(" / ", "Ï");
}

Then all your Strings have the same length. Cut them now into the Number/Letter Part and replace everything you want:

String letterPart = input.substring(0,3);
String numberPart= input.substring(3,7);
String rest = input.substring(7);
letterPart = letterPart.replace("0", "O");
numberPart = numberPart.replace("o", "0");
numberPart = numberPart.replace("Ï", "1");
numberPart = numberPart.replace("Z", "2");

Then put everything together again:

String result = letterPart + numberPart + rest;