Still on Java 17 and planning to upgrade?
☕️ Skip 21 and go straight to 25.

Java 25 provides memory efficiency gains and garbage collection improvements with zero code changes. Align it with your Spring Framework 7 / Spring Boot 4 upgrade.

Strong recommendation by Juergen Hoeller.

The Spring Debugger from @intellijidea.com autodetects your datasources and registers them into the Database tool window. This is particularly helpful when testing with Testcontainers.

It gives you instant database inspection, no setup. Super handy. 🧐

Continuing with the Spring optimization journey,
Spring Data 4.0 goes full speed ahead with AOT repositories 🚀.

Now your repository query methods are converted to actual source code at build time and compiled together with your application.

My Spring Boot apps expose plenty of metrics through Micrometer + Prometheus, but I'm really bad at creating Grafana dashboards.📈

I’ve been experimenting with the MCP server for Grafana and now instead of hand-crafting dashboards, I just ask: "Generate an HTTP dashboard for me":

🚀 Your Spring app could start up way faster.

With AOT Cache (introduced in Java 24) + Spring AOT, startup times drop like magic.

Curious how much you can gain? 👇

The next few months are going to be very interesting for Java / Spring devs. Java 25 is just 19 days away and can't wait to upgrade.

I know some of you might still be on Java 8, but remember, as @starbuxman.joshlong.com says, Java 25 will be +3x better than Java 8!

If you couldn't make it to @springio.net 2025, here's what you missed!

Save the dates for Spring I/O 2026 🍃: 13-15 April, Barcelona.