Johannes Bechberger 1/12/2026

The Fastest Way to get the Version of a Java Installation

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This article explains a high-performance method for retrieving the Java version by directly parsing the 'release' file in a Java installation directory, bypassing the slower process of calling 'java -version'. It details the performance issues with the standard method and introduces a custom tool for sub-millisecond version checks, relevant for CLI tools and performance-critical applications.

The Fastest Way to get the Version of a Java Installation

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