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`.java`

2 claimants 2 primary 0 secondary shared primary (2)

SWH popularity

Distinct files in the full Software Heritage archive (2026-06-04 export), dated by first appearance, following Desmazières, Di Cosmo, Lorentz (MSR 2025). Case-aggregated. citation.

1.3B

total files

502.6M

first seen 2021–2025 (38.6%)

2019

median year (half its files since)

Case variants in archive: .java (1.3B), .Java (25.4K), .JAVA (11.3K), .jaVA (15), .jAVA (14), .javA (9), .JAva (4), .JaVA (4), .JAVa (2), .jAva (2), .JavA (1) — aggregated above.

Attribution status

This extension is attributed to java; Java (programming language) as primary by 4 authoritative claims.

Authoritative sources: ✓ Linguist ✓ Pygments ✓ Wikidata · Q251 ✗ Wikipedia · no claim

Disagree or have a correction? Open a labelling issue.

Claimants (4)

Languages that list .java among their extensions. Strength reflects whether the upstream source treated it as their primary extension.

Language	Source	Strength
java	linguist	primary
java	pygments	primary
java	wikidata	primary
Java (programming language)	pygments	primary

Wikidata says… (1)

File formats, image formats, audio codecs and other non-PL entities that claim .java on Wikidata (property P1195) or in the Wikipedia infobox. Source: data/derived/external_extension_index.csv. Click Use as new PL on any row to open the Add-PL form pre-filled with that entry's name, Wikipedia/Wikidata URL, and this extension — one submission creates the PL + claim.

Right entry isn't listed? Add manually ↗

Format	Class (Wikidata `P31`)	Suggested label	MIME	Notes	Action
Java language source code file Q49243071 file format	file format	—	`text/x-java`	—	Use as new PL ↗

SWH-mined examples (2)

Real archived programs with this extension, byte-verified against the SWH archive, grouped by predicted language and by how the prediction was made. Useful for deciding what this extension actually is when the attribution is uncertain.

java (2) — 2 via unique-primary

VipissyCom.java · 10778 B · seen 16097× in SWH

predicted: java via unique-primary

swh:1:cnt:473f8539a6d4f4cbdacc281194df2d02caab06d0;origin=https://github.com/substanc3-dev/jdownloader2;anchor=swh:1:rev:ce70b66913b19ba109cdbfdb0c73604cdb0efe50;path=/src/jd/plugins/hoster/VipissyCom.java

Open in SWH · Raw bytes

GloriaTv.java · 13420 B · seen 13379× in SWH

predicted: java via unique-primary

swh:1:cnt:5bc38b0b6e4e70f445b5319768bc07a00fb75875;origin=https://github.com/substanc3-dev/jdownloader2;anchor=swh:1:rev:ce70b66913b19ba109cdbfdb0c73604cdb0efe50;path=/src/jd/plugins/hoster/GloriaTv.java

Open in SWH · Raw bytes