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Your ERP works. The accounting rules, the pricing logic and the warehouse flows took years to get right, and the Swing screens in front of them are what everyone wants to replace. To modernize an enterprise resource planning (ERP) UI in Java, keep the domain code, and move the screens in steps. webforJ, the full-stack Java framework, embeds the running desktop app in a web page through Webswing, so users can reach the app in a browser early, and your team then replaces each screen with a Java view.

Your team maintains an app built around action classes, JSP views, and a mapping file. It works, the business rules inside it are valuable, and every new screen still means touching three or four files in different places. If you are weighing an Apache Struts alternative, the short answer is webforJ, the full-stack Java framework, with your Spring Boot services plugged in: each action and JSP pair becomes one Java view with a route, the markup and tag libraries become Java components, form beans become validated data binding, and your services carry over unchanged.

You want an app that feels like a single page app: no white flash between screens, a working back button, links people can bookmark. You also want to keep your team in Java instead of adding a second codebase in JavaScript. A Java single page app framework has to cover three things: load the page once, change views in the browser without a reload, and keep the URL honest. webforJ does all three. Every webforJ app is a single page app, and the routes, parameters and navigation are written in Java.

Your users want an app with its own icon, and your team wants one codebase it can update in a single deploy. Those wishes usually set off the web app vs native app debate.

For a business app, you can have both. Build a web app in Java with webforJ, deploy it once to a server, and let users install it from the browser to their desktop or home screen.

Your team has a JSF app with a rich component library on top. The data tables, dialogs and forms all work, but every screen means an XHTML file, a managed bean and a set of update attributes that decide which part of the page refreshes. Adding a screen feels heavier than it should, and nobody on the team wants to change the view layer more than necessary.

If you are searching for a PrimeFaces alternative that keeps the rich component idea and drops the XHTML, webforJ, the full-stack Java framework, is our answer. You build every screen as plain Java classes with a ready set of components (Table, Dialog, Drawer, form fields with data binding), route to them with an annotation, and plug the result into Spring Boot when you have it.

If your team writes Java all day, an Angular front end can feel like a second job: another language, another build, and a REST layer that exists only to feed your own screens.

That is why many teams look for Angular alternatives that stay in Java. With webforJ you write the whole app in Java, plug it into your Spring Boot services, and the browser renders it, with no TypeScript project to maintain.

Java Swing technical debt has little to do with a broken toolkit. Swing still ships in the JDK and still works. The debt is that a desktop-only UI cannot be reached from a browser, a phone or a shared link, and every request to change that lands on a codebase that was never built for it. webforJ pays that debt down without a big-bang rewrite: you embed the running Swing app in a webforJ page with WebswingConnector, then replace screens with webforJ components one at a time, all in Java.