Article | REF: H1588 V2

Java virtual machine (JVM)

Author: Jean-Michel DOUIN

Publication date: August 10, 2013

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3. Java classes

Each file contains a Java type (class, interface or enumeration). A file is generated for an internal, local or anonymous class. This file contains the code and all the data required to execute the virtual machine's instructions. Most of this data is in symbolic form. The chosen format of the file ensures compliance with binary compatibility constraints and allows future extensions. The main steps involved in loading local or remote classes are also presented.

3.1 Compiled file format

The compiled file (or file with the suffix ".class") is a sequence of bytes.

Two bytes read form a 16-bit word, with the most significant byte first. 32- and 64-bit words...

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