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All About JDK 15
JDK 15 • 2020 • Java 15
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Sealed previewZGC progressPackaging

JDK 15 and the shift from JDK 14

JDK 15 kept pushing preview features forward while improving collector maturity and packaging realism.

Why JDK 15 mattered

The release in context

JDK 15 kept pushing preview features forward while improving collector maturity and packaging realism.

Sealed previewZGC progressPackaging
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  • JDK 15 kept pushing preview features forward while improving collector maturity and packaging realism.
  • This period shows the JDK balancing language experiments with production-oriented runtime polish.
Platform stack

JDK 15 architecture preview

This larger diagram expands the smaller JDK badge into a layered platform view showing how the development kit, runtime, virtual machine, APIs, tools, and supporting subsystems fit together for this release.

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Previous-version diff

What changed from JDK 14 to JDK 15

This period shows the JDK balancing language experiments with production-oriented runtime polish.

Platform movement

  • This period shows the JDK balancing language experiments with production-oriented runtime polish.
  • This release fits into the steady JDK cadence where tooling, runtime behavior, and delivery capabilities evolve one step at a time.
Matrix slice

Quick comparison table: JDK 14 vs JDK 15

This side-by-side view turns the source evolution matrix into a faster way to see which language, tooling, runtime, and platform layers moved between these two releases.

Area Component JDK 14 JDK 15 Why it stands out
Platform JDK 15 Previous baseline Current release This period shows the JDK balancing language experiments with production-oriented runtime polish.
Structured comparison

Grouped reading of the release shift

This release fits into the steady JDK cadence where tooling, runtime behavior, and delivery capabilities evolve one step at a time.

Platform evolution
New in JDK 15
  • Sealed preview
Updated by JDK 15
  • ZGC progress
Historical platform profile

Release narrative

JDK 15 kept pushing preview features forward while improving collector maturity and packaging realism.

This period shows the JDK balancing language experiments with production-oriented runtime polish.

Sealed previewZGC progressPackaging
Why it mattered later

Why JDK 15 matters in the JDK timeline

This release fits into the steady JDK cadence where tooling, runtime behavior, and delivery capabilities evolve one step at a time.

  • This release fits into the steady JDK cadence where tooling, runtime behavior, and delivery capabilities evolve one step at a time.
  • This period shows the JDK balancing language experiments with production-oriented runtime polish.
Related pages

Continue through the platform story

Common JDK Return to the JDK timeline and compare this release with neighboring toolkit milestones. Common Java See the language-level release story associated with this JDK version. Common JVM & Class File Connect this platform release with bytecode and runtime compatibility changes. Compatibility Cross-check this JDK version against Java, JLS, and class file milestones.