swiftlang/swift-java

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Java interopability support for Swift

Stars: 1.2k
Forks: 123
Open beginner issues: 0
Indexed issues: 132
Avg merge: 1d 7h
Merged PRs (30d): 16

Dominant language: Swift
License: Apache-2.0
Last GitHub push: Sep 16, 2026
Latest indexed: Sep 19, 2026
Contributing guide: Contributing guide
Code of conduct: Code of conduct
Beginner labels: help wanted good first issue

Beginner friendly Everything

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132 open issues indexed

jextract: Find ways to minimize string copying when passing Java String to Swift Open

feature:jextract

Difficulty 5/5 Over a week Newbie friendliness 25/100

swiftlang/swift-java#202 · Opened Dec 16, 2024
`make javakit-generate` generates different `generated/` files. Open

Difficulty 3/5 1-2 days Newbie friendliness 45/100

swiftlang/swift-java#201 · Opened Dec 13, 2024
Throwable CustomStringConvertible is risking infinite recursion Open

bug mode:jni

Difficulty 4/5 3-5 days Newbie friendliness 25/100

swiftlang/swift-java#196 · 1 comment · Opened Dec 5, 2024
Java2Swift: nested types in generic types Open

bug feature:wrap-java help wanted

Difficulty 4/5 3-5 days Newbie friendliness 35/100

swiftlang/swift-java#194 · Opened Dec 5, 2024
Consolidate how we do logging in plugins Open

good first issue help wanted

swiftlang/swift-java#193 · 1 comment · 1 assignee · Opened Dec 3, 2024
See if we can use --scratch-path to speed up samples building Open

build help wanted

Difficulty 4/5 3-5 days Newbie friendliness 35/100

swiftlang/swift-java#187 · 1 comment · Opened Nov 20, 2024
Use-case: We should be able to deserialize a Java type using Jackson etc. Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

swiftlang/swift-java#186 · Opened Nov 19, 2024
Make sure we don't cause stray o and swiftdeps files in root directories Open

feature:wrap-java

Difficulty 4/5 3-5 days Newbie friendliness 42/100

swiftlang/swift-java#185 · Opened Nov 19, 2024
How to build a `.so` dynamic lib on macOS, for building multi-platform jars Open

plugin:swiftpm

Difficulty 5/5 Over a week Newbie friendliness 25/100

swiftlang/swift-java#181 · Opened Nov 18, 2024
Java2Swift: static native methods Open

feature:wrap-java help wanted

Difficulty 4/5 3-5 days Newbie friendliness 38/100

swiftlang/swift-java#175 · 1 comment · Opened Nov 10, 2024
Consider PanamaPort-style use of Panama APIs on Android? Open

android feature:jextract question

Difficulty 5/5 Over a week Newbie friendliness 20/100

swiftlang/swift-java#171 · Opened Nov 9, 2024
JavaKit: inout primitive arrays Open

mode:jni

Difficulty 4/5 3-5 days Newbie friendliness 35/100

swiftlang/swift-java#156 · 5 comments · Opened Nov 7, 2024
Java2Swift: Tools version prior to 6.0 breaks Java2Swift in difficult to diagnose ways Open

Difficulty 3/5 1-2 days Newbie friendliness 38/100

swiftlang/swift-java#149 · Opened Nov 3, 2024
Consider various @Nullable @Nonnull annotations when importing types Open

feature:wrap-java mode:jni

Difficulty 5/5 Over a week Newbie friendliness 25/100

swiftlang/swift-java#130 · 2 comments · Opened Oct 28, 2024
JavaCompilerPlugin doesn't handle outputs correctly Open

help wanted plugin:swiftpm

Difficulty 4/5 3-5 days Newbie friendliness 35/100

swiftlang/swift-java#114 · 2 comments · Opened Oct 25, 2024
JavaKit: Cache field/method IDs in JavaObjectHolder Open

mode:jni

Difficulty 4/5 3-5 days Newbie friendliness 35/100

swiftlang/swift-java#113 · Opened Oct 25, 2024
Java2Swift: Improve diagnostics when we suppress import due to a missing Java class import Open

feature:wrap-java good first issue

Difficulty 5/5 Over a week Newbie friendliness 35/100

swiftlang/swift-java#112 · 2 comments · Opened Oct 25, 2024
Java2Swift: Investigate using getDeclaredMethods()/getDeclaredConstructors()/etc. to find non-public members Open

feature:wrap-java

Difficulty 5/5 Over a week Newbie friendliness 25/100

swiftlang/swift-java#106 · Opened Oct 23, 2024
jextract: support all other functional interfaces (Supplier and friends) Open

feature:jextract good first issue help wanted

Difficulty 4/5 3-5 days Newbie friendliness 54/100

swiftlang/swift-java#101 · 1 comment · Opened Oct 22, 2024
Downcalls to witness table (e.g. destroy) hang on Linux x86_64 Open

bug feature:jextract

Difficulty 4/5 3-5 days Newbie friendliness 38/100

swiftlang/swift-java#97 · Opened Oct 22, 2024
Java2Swift: Generalize conformances of Java collection types to Swift sequence protocols Open

feature:wrap-java good first issue

Difficulty 5/5 Over a week Newbie friendliness 45/100

swiftlang/swift-java#96 · 1 comment · Opened Oct 20, 2024
Invalidate Java wrapper when we destroy() an underlying swift instance Open

enhancement feature:jextract good first issue help wanted

Difficulty 4/5 3-5 days Newbie friendliness 43/100

swiftlang/swift-java#85 · Opened Oct 16, 2024
Wrap java.util.function classes nicely in Swift Open

feature:wrap-java good first issue mode:jni

Difficulty 5/5 Over a week Newbie friendliness 25/100

swiftlang/swift-java#84 · 1 comment · 3 reactions · Opened Oct 15, 2024
SwiftPM command plugin to ingest a Jar file into a SwiftPM target to wrap those Java classes Open

feature:wrap-java plugin:swiftpm

Difficulty 5/5 Over a week Newbie friendliness 35/100

swiftlang/swift-java#82 · 1 comment · Opened Oct 15, 2024
[ffm] jextract support importing `throws` functions Open

feature:jextract mode:ffm

Difficulty 5/5 Over a week Newbie friendliness 25/100

swiftlang/swift-java#34 · 1 comment · Opened Oct 1, 2024
jextract-swift support importing nested types Open

feature:jextract

Difficulty 4/5 3-5 days Newbie friendliness 35/100

swiftlang/swift-java#33 · 2 comments · Opened Oct 1, 2024
jextract-swift support for generic Swift methods Open

feature:jextract

Difficulty 5/5 Over a week Newbie friendliness 25/100

swiftlang/swift-java#32 · Opened Oct 1, 2024
jextract-swift: allow $direct access to properties when we know their offset/layout, and no side effects Open

feature:jextract good first issue help wanted performance

Difficulty 5/5 Over a week Newbie friendliness 30/100

swiftlang/swift-java#30 · 2 comments · Opened Oct 1, 2024
Build tooling to wrap up a Swift library for use in Java Open

plugin:swiftpm

Difficulty 5/5 Over a week Newbie friendliness 30/100

swiftlang/swift-java#17 · 1 comment · Opened Sep 30, 2024
Create a runtime mapping from Java canonical class names to their equivalent Swift types Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

swiftlang/swift-java#15 · Opened Sep 30, 2024
`AnyJavaObject` doesn't have any conformance to `JavaValue` Open

feature:wrap-java

Difficulty 4/5 3-5 days Newbie friendliness 42/100

swiftlang/swift-java#13 · 1 comment · Opened Sep 29, 2024
Bring more clarity on JDK version requirements Open

build documentation

Difficulty 4/5 3-5 days Newbie friendliness 38/100

swiftlang/swift-java#12 · 4 comments · Opened Sep 28, 2024

swiftlang/swift-java

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