Loading...
Loading...
Migration of Delphi applications to Java 21 and Spring Boot, with proven functional parity. ATLAS methodology.
Java as a Delphi target makes sense when the target IT ecosystem is Java (integration with existing Spring applications, Java ERP, Java EE middleware) or when the organization has strong internal Java expertise but no C# expertise. For applications with preserved desktop need, JavaFX offers a native experience. For web, Vaadin or a separate SPA (React/Angular) are the options. If Microsoft is dominant, Delphi to .NET Core is more natural. If the goal is cloud-native web, Delphi to TypeScript is often preferable.
A Delphi to Java migration is planned over **eight to eighteen months** depending on volume and target interface (JavaFX desktop, Vaadin web, or SPA). Typical cell: Delphi-Java architect, Java tech lead, two to four Java developers, a senior Delphi developer for business knowledge, a QA, a DBA for embedded databases. Pascal-Java syntactic distance is **larger** than Pascal-C#: plan deep Java training for transitioning Delphi developers.
Underestimating the Pascal-Java syntactic distance. Unlike C#, Java has no native properties, no delegates, no records (before Java 16), less explicit memory management than Delphi.
Documented translation patterns: Pascal properties → Java getter/setter with Lombok, delegates → Java 8+ functional interfaces, Pascal records → Java 16+ records or immutable classes. Unit parity tests on each translation pattern.
Choosing JavaFX desktop by default without re-evaluating the business need. JavaFX is less maintained than Swing and much less rich than React/Angular for web.
Re-evaluation of desktop vs web need: if users are on Windows internally, .NET Core WinForms may be simpler. If true web modernization is desired, look instead at Delphi to TypeScript or Vaadin. JavaFX only if Java is imposed by the target IT.
Three cases justify Java: (1) target IT dominated by Java (Spring, JEE, existing integrations), (2) organization with strong internal Java expertise without C# expertise, (3) multi-OS portability required with Linux preferred. Otherwise, .NET Core is more natural (Pascal-C# syntactic proximity) or TypeScript if the goal is cloud web.
For a Delphi application of 50 to 100 thousand lines in nearshore co-delivery, plan 600 k€ to 1 M€ including UX, development, tests. Equivalent cost to .NET Core on comparable volumes, slightly higher if deep Java training for the transitioning Delphi team.
We frame the trajectory, the budget, and the deliverables in a first thirty-minute conversation. A short POC can be proposed before committing to the full program.
Start this path →