Java Bytecode Version: Difference between revisions
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=Internal= | =Internal= | ||
* [[Java_Bytecode# | * [[Java_Bytecode#Java_Bytecode_Version|Java Bytecode]] | ||
* [[Gradle_Java_Plugin#Use_a_Specific_Java_Version|Specifying a bytecode version in Gradle]] | |||
=Overview= | =Overview= | ||
A valid class file starts with <code>0xcafebabe</code>, followed by the minor version as unsigned short, followed by the major version, as unsigned short. | A valid class file starts with <code>0xcafebabe</code>, followed by the minor version as unsigned short, followed by the major version, as unsigned short. | ||
{|class="wikitable" style="text-align: left;" | {|class="wikitable" style="text-align: left;" | ||
| | ! Java Version | ||
! Bytecode Version | |||
|- | |||
| 1.0 || 45.0 | |||
|- | |||
| 1.1 || 45.3 | |||
|- | |||
| 1.2 || 46.0 | |||
|- | |||
| 1.3 || 47.0 | |||
|- | |||
| 1.4 || 48.0 | |||
|- | |||
| 5 || 49.0 | |||
|- | |||
| 6 || 50.0 | |||
|- | |||
| 7 || 51.0 | |||
|- | |||
| 8 || 52.0 | |||
|- | |||
| 9 || 53.0 | |||
|- | |||
| 10 || 54.0 | |||
|- | |||
| 11 || 55.0 | |||
|- | |||
| 12 || 56.0 | |||
|- | |||
| 13 || 57.0 | |||
|- | |||
| 14 || 58.0 | |||
|- | |||
| 15 || 59.0 | |||
|- | |||
| 16 || 60.0 | |||
|- | |||
| 17 || 61.0 | |||
|- | |- | ||
|} | |} | ||
Latest revision as of 19:14, 12 June 2021
Internal
Overview
A valid class file starts with 0xcafebabe, followed by the minor version as unsigned short, followed by the major version, as unsigned short.
| Java Version | Bytecode Version |
|---|---|
| 1.0 | 45.0 |
| 1.1 | 45.3 |
| 1.2 | 46.0 |
| 1.3 | 47.0 |
| 1.4 | 48.0 |
| 5 | 49.0 |
| 6 | 50.0 |
| 7 | 51.0 |
| 8 | 52.0 |
| 9 | 53.0 |
| 10 | 54.0 |
| 11 | 55.0 |
| 12 | 56.0 |
| 13 | 57.0 |
| 14 | 58.0 |
| 15 | 59.0 |
| 16 | 60.0 |
| 17 | 61.0 |
Playground
The following project produces a bytecode-version.jar that reads the bytecode version from a Java class: