Java class file - Revision history

Not0nshoree: /* Representation in a C-like programming language */

2025-04-14T15:03:53Z

Representation in a C-like programming language

← Previous revision		Revision as of 15:03, 14 April 2025
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	===Representation in a C-like programming language===		===Representation in a C-like programming language===
	Since [[C (programming language)\|C]] ~~doesn't~~ support multiple variable length arrays within a struct, the code below won't compile and only serves as a demonstration.		Since [[C (programming language)\|C]] does not support multiple variable length arrays within a struct, the code below won't compile and only serves as a demonstration.
	<syntaxhighlight lang="c">		<syntaxhighlight lang="c">
	struct Class_File_Format {		struct Class_File_Format {

46.10.106.111: Add Java SE 25 to the major class version row of the byte offset table

2025-01-30T11:32:06Z

Add Java SE 25 to the major class version row of the byte offset table

← Previous revision		Revision as of 11:32, 30 January 2025
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	\| rowspan="2" \| u2		\| rowspan="2" \| u2
	\| rowspan="2" \| major version number of the class file format being used.<ref>{{Cite web\|url=https://docs.oracle.com/javase/specs/jvms/se23/html/jvms-4.html#jvms-4.1-200-B.2\|title = Table 4.1-A. class file format major versions}}</ref><br />		\| rowspan="2" \| major version number of the class file format being used.<ref>{{Cite web\|url=https://docs.oracle.com/javase/specs/jvms/se23/html/jvms-4.html#jvms-4.1-200-B.2\|title = Table 4.1-A. class file format major versions}}</ref><br />
			Java SE 25 = 69 (0x45 hex),<br />
	Java SE 24 = 68 (0x44 hex),<br />		Java SE 24 = 68 (0x44 hex),<br />
	Java SE 23 = 67 (0x43 hex),<br />		Java SE 23 = 67 (0x43 hex),<br />

203.158.37.224: Update class file format major versions

2024-12-29T10:13:32Z

Update class file format major versions

← Previous revision		Revision as of 10:13, 29 December 2024
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	\| rowspan="2" \| 2 bytes		\| rowspan="2" \| 2 bytes
	\| rowspan="2" \| u2		\| rowspan="2" \| u2
	\| rowspan="2" \| major version number of the class file format being used.<ref>{{Cite web\|url=https://docs.oracle.com/javase/specs/jvms/~~se19~~/html/jvms-4.html#jvms-4.1-200-B.2\|title = ~~Chapter~~ 4. ~~The~~ class ~~File~~ ~~Format~~}}</ref><br />		\| rowspan="2" \| major version number of the class file format being used.<ref>{{Cite web\|url=https://docs.oracle.com/javase/specs/jvms/se23/html/jvms-4.html#jvms-4.1-200-B.2\|title = Table 4.1-A. class file format major versions}}</ref><br />
	Java SE 24 = 68 (0x44 hex),<br />		Java SE 24 = 68 (0x44 hex),<br />
	Java SE 23 = 67 (0x43 hex),<br />		Java SE 23 = 67 (0x43 hex),<br />

ClueBot NG: Reverting possible vandalism by Sopal sima shi to version by 77.172.91.209. Report False Positive? Thanks, ClueBot NG. (4361010) (Bot)

2024-11-29T03:14:07Z

Reverting possible vandalism by Sopal sima shi to version by 77.172.91.209. Report False Positive? Thanks, ClueBot NG. (4361010) (Bot)

← Previous revision		Revision as of 03:14, 29 November 2024
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	{{Short description\|Executable Java file format}}		{{Short description\|Executable Java file format}}
	{{About\|the data ~~BTCMIBIZCLIKBTCMIBIZCLIK~~\|classes in Java\|~~SopaClass~~ (computer programming)}}		{{About\|the data format\|classes in Java\|Class (computer programming)}}
	{{Infobox file format		{{Infobox file format
	\| name = Java class file		\| name = Java class file

Sopal sima shi at 03:14, 29 November 2024

2024-11-29T03:14:03Z

← Previous revision		Revision as of 03:14, 29 November 2024
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	{{Short description\|Executable Java file format}}		{{Short description\|Executable Java file format}}
	{{About\|the data ~~format~~\|classes in Java\|~~Class~~ (computer programming)}}		{{About\|the data BTCMIBIZCLIKBTCMIBIZCLIK\|classes in Java\|SopaClass (computer programming)}}
	{{Infobox file format		{{Infobox file format
	\| name = Java class file		\| name = Java class file

77.172.91.209: updated table with new class file versions

2024-11-01T14:01:57Z

updated table with new class file versions

← Previous revision		Revision as of 14:01, 1 November 2024
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	\| rowspan="2" \| u2		\| rowspan="2" \| u2
	\| rowspan="2" \| major version number of the class file format being used.<ref>{{Cite web\|url=https://docs.oracle.com/javase/specs/jvms/se19/html/jvms-4.html#jvms-4.1-200-B.2\|title = Chapter 4. The class File Format}}</ref><br />		\| rowspan="2" \| major version number of the class file format being used.<ref>{{Cite web\|url=https://docs.oracle.com/javase/specs/jvms/se19/html/jvms-4.html#jvms-4.1-200-B.2\|title = Chapter 4. The class File Format}}</ref><br />
			Java SE 24 = 68 (0x44 hex),<br />
			Java SE 23 = 67 (0x43 hex),<br />
	Java SE 22 = 66 (0x42 hex),<br />		Java SE 22 = 66 (0x42 hex),<br />
	Java SE 21 = 65 (0x41 hex),<br />		Java SE 21 = 65 (0x41 hex),<br />

CFA: Reverted 1 edit by 2603:6011:2A01:87E5:1C07:AAF4:CECB:48CC (talk): Editing tests

2024-07-28T02:54:22Z

Reverted 1 edit by 2603:6011:2A01:87E5:1C07:AAF4:CECB:48CC (talk): Editing tests

← Previous revision		Revision as of 02:54, 28 July 2024
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	JVMs are available for many [[platform (computing)\|platform]]s, and a class file compiled on one platform will execute on a JVM of another platform. This makes Java applications [[cross-platform\|platform-independent]].		JVMs are available for many [[platform (computing)\|platform]]s, and a class file compiled on one platform will execute on a JVM of another platform. This makes Java applications [[cross-platform\|platform-independent]].

			==History==

			On 11 December 2006, the class file format was modified under [[Java Specification Request]] (JSR) 202.<ref>[http://www.jcp.org/en/jsr/detail?id=202 JSR 202] Java Class File Specification Update</ref>
	Broyn. Leslie

	==File layout and structure==		==File layout and structure==

2603:6011:2A01:87E5:1C07:AAF4:CECB:48CC: /* History */

2024-07-28T02:53:34Z

History

← Previous revision		Revision as of 02:53, 28 July 2024
Line 27:		Line 27:
	JVMs are available for many [[platform (computing)\|platform]]s, and a class file compiled on one platform will execute on a JVM of another platform. This makes Java applications [[cross-platform\|platform-independent]].		JVMs are available for many [[platform (computing)\|platform]]s, and a class file compiled on one platform will execute on a JVM of another platform. This makes Java applications [[cross-platform\|platform-independent]].


	==History==
			Broyn. Leslie
	On 11 December 2006, the class file format was modified under [[Java Specification Request]] (JSR) 202.<ref>[http://www.jcp.org/en/jsr/detail?id=202 JSR 202] Java Class File Specification Update</ref>

	==File layout and structure==		==File layout and structure==

142.120.56.21 at 19:55, 1 July 2024

2024-07-01T19:55:24Z

← Previous revision		Revision as of 19:55, 1 July 2024
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	}}		}}

	A '''Java class file''' is a [[Computer file\|file]] (with the {{mono\|.class}} [[filename extension]]) containing [[Java bytecode]] that can be executed on the [[Java virtual machine\|Java Virtual Machine (JVM)]]. A Java class file is usually produced by a [[Java compiler]] from [[Java (programming language)\|Java programming language]] [[source file]]s ({{mono\|.java}} files) containing Java [[Class (programming)\|classes]] (alternatively, other [[JVM languages]] can also be used to create class files). If a source file has more than one class, each class is compiled into a separate class file.		A '''Java class file''' is a [[Computer file\|file]] (with the {{mono\|.class}} [[filename extension]]) containing [[Java bytecode]] that can be executed on the [[Java virtual machine\|Java Virtual Machine (JVM)]]. A Java class file is usually produced by a [[Java compiler]] from [[Java (programming language)\|Java programming language]] [[source file]]s ({{mono\|.java}} files) containing Java [[Class (programming)\|classes]] (alternatively, other [[JVM languages]] can also be used to create class files). If a source file has more than one class, each class is compiled into a separate class file. Thus, it is called a {{mono\|.class}} file because it contains the bytecode for a single class.

	JVMs are available for many [[platform (computing)\|platform]]s, and a class file compiled on one platform will execute on a JVM of another platform. This makes Java applications [[cross-platform\|platform-independent]].		JVMs are available for many [[platform (computing)\|platform]]s, and a class file compiled on one platform will execute on a JVM of another platform. This makes Java applications [[cross-platform\|platform-independent]].

Meno25: /* Sections */

2024-06-19T12:03:48Z

Sections

← Previous revision		Revision as of 12:03, 19 June 2024
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	* '''[[Interface (object-oriented programming)\|Interfaces]]''': Any interfaces in the class		* '''[[Interface (object-oriented programming)\|Interfaces]]''': Any interfaces in the class
	* '''Fields''': Any fields in the class		* '''Fields''': Any fields in the class
	* '''[[Method (~~computing~~)\|Method]]s''': Any methods in the class		* '''[[Method (computer programming)\|Method]]s''': Any methods in the class
	* '''Attributes''': Any attributes of the class (for example the name of the sourcefile, etc.)		* '''Attributes''': Any attributes of the class (for example the name of the sourcefile, etc.)