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NuGet · #1407 most downloaded on NuGet
J2N is a library that helps bridge the gap between .NET and Java. It provides components to assist with porting Java code to .NET, such as collections, adapters, and extensions. It contains some features from Java that also make it generally useful in any .NET application.
Last release 1 months ago
08 Sep 2026
Ships unpredictably
gaps range from 8 days to 2.8 years
Nearly every release is documented
notes for 2 of 2 stable releases
1 version withdrawn
withdrawn after publishing
127 years old
25 releases · first in 1900
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One column per quarter.
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This release focuses primarily on the following:
This release focuses primarily on the following:
ReadOnlySpan<T> and Span<T>, especially on stringsDictionary<TKey, TValue>, SortedDictionary<TKey, TValue> and SortedSet<T> to be equivalent to .NET 8net8.0Full Changelog: v2.0.0...v2.1.0
Use latest SDKs for build and tests (6.0.101, 5.0.404, 3.1.416)
J2N.Collections.Generic.EqualityComparer, J2N.Collections.Generic.Comparer: Added nullable value type support for float? and double?J2N.Text.StringFormatter: Added constructor overload for IFormatProvider, deprecated Culture property, added FormatProvider propertydependencies.props.gitattributes filebuild directory to .buildPrintTargetFrameworks MSBuild target to read the supported target frameworks for a given test projectSkipGitVersioning MSBuild property to remove the Nerdbank.GitVersioning NuGet package reference when creating versions via scriptsazure-pipelines.yml to allow overriding version info using parametersNothing published for this version
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