All About JLS 10

JLS 10 introduced local-variable type inference with `var`, a targeted simplification rather than a broad move to implicit typing.

Specification edition

JLS 10

JLS 10 introduced local-variable type inference with `var`, a targeted simplification rather than a broad move to implicit typing.

varLocal inferenceReduced ceremony

What shifted

Defined where inference is allowed and where explicit typing remains required.

It improved readability in many local contexts while preserving Java's explicitness at API boundaries.

Reading note

The spec changes are deceptively small-looking but important for maintaining Java's balance between clarity and convenience.

This milestone is useful when comparing Java's conservative inference story to other mainstream languages.