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All About JDK 1.0
JDK 1.0 • 1995 • Java 1.0
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Original toolchainApplet eraFoundation APIs

All About JDK 1.0

The first JDK bundled the compiler, launcher, applet-era tooling, and the original standard library into one developer-facing kit.

Foundational release

The original Java development kit

The first JDK bundled the compiler, launcher, applet-era tooling, and the original standard library into one developer-facing kit.

Original toolchainApplet eraFoundation APIs
  • The first JDK bundled the compiler, launcher, applet-era tooling, and the original standard library into one developer-facing kit.
  • This is where the basic build-and-run story was born: write source, compile with javac, package what you need, and run on the JVM.
Platform stack

JDK 1.0 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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Historical platform profile

How the first JDK established the baseline

This is where the basic build-and-run story was born: write source, compile with javac, package what you need, and run on the JVM.

Original toolchainApplet eraFoundation APIs
Why it mattered

Why JDK 1.0 still matters in the timeline

This release is best understood as a turning point in how developers thought about the Java platform, not just as a routine toolkit increment.

  • This release is best understood as a turning point in how developers thought about the Java platform, not just as a routine toolkit increment.
  • This is where the basic build-and-run story was born: write source, compile with javac, package what you need, and run on the JVM.
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.