Null Safety in Spring with JSpecify and NullAway

In 1965, Tony Hoare invented the null reference—a tiny design decision he later called “the billion-dollar mistake.” Why? Because allowing nulls without requiring developers to declare or handle them explicitly has led to decades of bugs, crashes, and production fires. Java still bears the weight of that choice, but the tide is turning. With JSpecify and NullAway, Java developers can finally bring null safety into their workflow—catching potential NullPointerExceptions at compile time and making the absence of a value part of the type system. In this talk, you will learn how JSpecify works, how to use it with NullAway, and how it helps turn null from hazard to feature. We will also share what is coming in Spring Framework 7 and Spring…Read More

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