QR Code Class Modification PLSQL + JAVA

I need a Java class in PLSQL modified to add a mandatory 6th text field.

Requirements:
- Current class generates QR codes from 5 fields, need to add 6th field
- 6th field is mandatory
- No specific validation rules needed for 6th field

Ideal skills:
- Experience with Java and PLSQL
- Familiarity with QR code generation
- Ability to make quick modifications to existing code