openrewrite/rewrite-static-analysis

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OpenRewrite recipes for identifying and fixing static analysis issues.

Stars: 62
Forks: 112
Open beginner issues: 0
Indexed issues: 114
Avg merge: 1d 19h
Merged PRs (30d): 40

Dominant language: Java
License: No license data
Last GitHub push: Sep 17, 2026
Latest indexed: Sep 19, 2026
Contributing guide: Contributing guide
Code of conduct: No code of conduct
Beginner labels: good first issue

Beginner friendly Everything

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114 open issues indexed

ForLoopIncrementInUpdate changes behavior when the loop body contains continue Open

Difficulty 3/5 1-2 days Newbie friendliness 72/100

openrewrite/rewrite-static-analysis#1061 · Opened Sep 16, 2026
AddSerialVersionUidToSerializable skips generic classes implementing Serializable Open

bug

Difficulty 3/5 1-2 days Newbie friendliness 78/100

openrewrite/rewrite-static-analysis#1055 · Opened Sep 10, 2026
EmptyBlock and RemoveMethodsOnlyCallSuper delete blocks and methods whose only content is a comment Open

bug

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

openrewrite/rewrite-static-analysis#1050 · Opened Sep 3, 2026
CombineSemanticallyEqualCatchBlocks indexes J.Case#getCaseLabels() unguarded, and only ever compares the first label Open

Difficulty 2/5 1-3 hours Newbie friendliness 78/100

openrewrite/rewrite-static-analysis#985 · Opened Aug 11, 2026
`SimplifyElseBranch` puts comment in not the best location Open

bug

Difficulty 3/5 1-2 days Newbie friendliness 48/100

openrewrite/rewrite-static-analysis#878 · 4 comments · Opened May 4, 2026
`InlineVariable` to handle more complex expressions too Open

enhancement

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

openrewrite/rewrite-static-analysis#803 · 3 comments · Opened Jan 8, 2026
`NullPointerException` (NPE) in `NestedEnumsAreNotStatic` Open

bug

Difficulty 3/5 1-2 days Newbie friendliness 48/100

openrewrite/rewrite-static-analysis#796 · 2 comments · Opened Dec 3, 2025
`RemoveUnused(Local)Parameter/RemoveUnusedParameters` Open

enhancement

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

openrewrite/rewrite-static-analysis#780 · 2 comments · Opened Nov 11, 2025
Recipe to move fields to the top of class definition Open

recipe

openrewrite/rewrite-static-analysis#721 · 1 assignee · Opened Aug 25, 2025
Recipe to simplify code when a similar expression is used in both values of a ternary operator Open

recipe

Difficulty 4/5 3-5 days Newbie friendliness 45/100

openrewrite/rewrite-static-analysis#695 · Opened Aug 7, 2025
Recipe to replace trivial if statements with ternary operator Open

recipe

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

openrewrite/rewrite-static-analysis#683 · 2 comments · Opened Jul 31, 2025
Recipe to extract the common code if both if and else start with the same statement Open

recipe

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

openrewrite/rewrite-static-analysis#681 · Opened Jul 31, 2025
Recipe to move classes to their own files Open

recipe

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

openrewrite/rewrite-static-analysis#667 · Opened Jul 28, 2025
Recipe to use for-each kind of a loop when iterating over a collection Open

recipe

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

openrewrite/rewrite-static-analysis#626 · 1 comment · Opened Jul 8, 2025
Recipe to avoid calling `Pattern.compile()` too many times Open

recipe

Difficulty 3/5 1-2 days Newbie friendliness 48/100

openrewrite/rewrite-static-analysis#622 · Opened Jul 7, 2025
Recipe to prefer `Collection.contains` over multiple OR-ed comparisons Open

recipe

Difficulty 3/5 1-2 days Newbie friendliness 48/100

openrewrite/rewrite-static-analysis#618 · Opened Jul 4, 2025
Recipe to convert collection literals which are never mutated to constants Open

recipe

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

openrewrite/rewrite-static-analysis#617 · 1 comment · Opened Jul 4, 2025
Recipe to prefer early return when handling some non-default code paths Open

recipe

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

openrewrite/rewrite-static-analysis#609 · 2 comments · Opened Jun 30, 2025
use `try-with-resources` statement Open

enhancement recipe

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

openrewrite/rewrite-static-analysis#591 · 6 comments · Opened Jun 12, 2025
RemoveUnusedAssignments Open

recipe

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

openrewrite/rewrite-static-analysis#564 · 1 comment · 3 reactions · Opened May 19, 2025
RemoveUnusedLocalParam Open

enhancement recipe

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

openrewrite/rewrite-static-analysis#559 · 2 comments · Opened May 15, 2025
JavadocParagraph Open

enhancement good first issue recipe

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

openrewrite/rewrite-static-analysis#545 · 9 comments · Opened May 7, 2025
Replace nested ifs with one if and conditions joined with && Open

recipe

Difficulty 3/5 1-2 days Newbie friendliness 35/100

openrewrite/rewrite-static-analysis#537 · 1 comment · Opened Apr 30, 2025
Migrate from `java.io.File` to `java.nio.Path` Open

enhancement recipe

Difficulty 5/5 Over a week Newbie friendliness 28/100

openrewrite/rewrite-static-analysis#509 · 4 comments · Opened Apr 15, 2025
CombineSemanticallyEqualCatchBlocks expects too much when comparing body clauses Open

bug

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

openrewrite/rewrite-static-analysis#506 · 1 comment · Opened Apr 14, 2025
Improve naming: Change `boolean1` to `bool` and standardize fields Open

bug

Difficulty 3/5 1-2 days Newbie friendliness 35/100

openrewrite/rewrite-static-analysis#502 · 6 comments · Opened Apr 11, 2025
InstanceOfPatternMatch changes code meaning with multiple reassignments Open

bug

Difficulty 4/5 3-5 days Newbie friendliness 50/100

openrewrite/rewrite-static-analysis#480 · 5 comments · 1 reaction · Opened Mar 20, 2025
CodeCleanup: Compilation failure using `as`-statement SimpleAssociation<*, *> Open

bug kotlin

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

openrewrite/rewrite-static-analysis#446 · 2 comments · Opened Jan 16, 2025
revise Hungarian notation (antipattern) Open

recipe

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

openrewrite/rewrite-static-analysis#371 · 2 comments · 1 reaction · Opened Oct 15, 2024
Format empty lines misaligning with Java Code Conventions Open

recipe

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

openrewrite/rewrite-static-analysis#370 · 2 comments · Opened Oct 14, 2024
RSPEC-2864 - entrySet()" should be iterated when both the key and value are needed Open

recipe

Difficulty 4/5 3-5 days Newbie friendliness 28/100

openrewrite/rewrite-static-analysis#360 · 2 comments · Opened Oct 12, 2024
Prevent unintentional changes in logging best practices that conflict with Google Java Format Open

enhancement

Difficulty 4/5 3-5 days Newbie friendliness 45/100

openrewrite/rewrite-static-analysis#354 · 2 comments · Opened Oct 5, 2024
org.openrewrite.staticanalysis.ReplaceDuplicateStringLiterals creates unnecessary duplicates Open

bug

Difficulty 3/5 1-2 days Newbie friendliness 35/100

openrewrite/rewrite-static-analysis#351 · 3 comments · 1 reaction · Opened Oct 2, 2024
org.openrewrite.staticanalysis.AvoidBoxedBooleanExpressions does not understand @NonNull annotations Open

bug

Difficulty 3/5 1-2 days Newbie friendliness 35/100

openrewrite/rewrite-static-analysis#349 · 2 comments · Opened Oct 2, 2024
NullableOnMethodReturnType seems incomplete Open

enhancement good first issue

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

openrewrite/rewrite-static-analysis#318 · 3 comments · Opened Aug 1, 2024
`OperatorWrap` and `WrappingAndBraces` causing wrong result for Kotlin Open

bug

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

openrewrite/rewrite-static-analysis#302 · 1 comment · Opened Jun 12, 2024
DefaultComesLast recipe creates duplicate case Open

bug

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

openrewrite/rewrite-static-analysis#289 · 4 comments · Opened May 9, 2024
Recipe to replace autoboxing with explicit `valueOf` Open

recipe

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

openrewrite/rewrite-static-analysis#288 · 1 comment · Opened May 7, 2024
Modifier order of javadoc tags Open

enhancement good first issue recipe

Difficulty 3/5 1-2 days Newbie friendliness 62/100

openrewrite/rewrite-static-analysis#283 · 12 comments · Opened Apr 1, 2024
Enhance InstanceOfPatternMatch to cover method invocations as well Open

enhancement

Difficulty 3/5 1-2 days Newbie friendliness 42/100

openrewrite/rewrite-static-analysis#275 · 4 comments · Opened Mar 8, 2024
Prefer String::equalsToIgnoreCase - "foo".equals("Foo".toLowercase()) -> "foo".equalsToIgnoreCase("Foo") Open

enhancement

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

openrewrite/rewrite-static-analysis#274 · 6 comments · Opened Mar 8, 2024
BigDecimalDoubleConstructorRecipe should also convert BigDecimal.valueOf(doubleLiteral) -> new BigDecimal(stringLiteral) Open

enhancement

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

openrewrite/rewrite-static-analysis#255 · 2 comments · Opened Feb 9, 2024
`RenamePrivateFieldsToCamelCase` should not rename annotated fields, similar to `FinalizePrivateFields` Open

bug

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

openrewrite/rewrite-static-analysis#254 · 7 comments · Opened Feb 9, 2024
`FallThrough` should not add break when `switch` is last statement in a method requiring a `return` Open

bug

Difficulty 3/5 1-2 days Newbie friendliness 42/100

openrewrite/rewrite-static-analysis#229 · 1 comment · Opened Dec 18, 2023
UnnecessaryParentheses should keep line breaks Open

bug

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

openrewrite/rewrite-static-analysis#219 · Opened Nov 17, 2023
CommonStaticAnalysis recipe does not change calls to getter/setters on camel casing changes. Open

bug

Difficulty 3/5 1-2 days Newbie friendliness 35/100

openrewrite/rewrite-static-analysis#189 · 1 comment · Opened Oct 11, 2023
`RenamePrivateFieldsToCamelCase` misses cases when method parameters with target name exist Open

bug

Difficulty 3/5 1-2 days Newbie friendliness 65/100

openrewrite/rewrite-static-analysis#186 · Opened Oct 9, 2023
Extend TernaryOperatorsShouldNotBeNested to collapse switch cases Open

enhancement

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

openrewrite/rewrite-static-analysis#159 · Opened Aug 22, 2023
Extend TernaryOperatorsShouldNotBeNested with pattern matching Open

enhancement

Difficulty 3/5 1-2 days Newbie friendliness 55/100

openrewrite/rewrite-static-analysis#158 · Opened Aug 22, 2023
Extend TernaryOperatorsShouldNotBeNested to support null safe switch expressions Open

enhancement

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

openrewrite/rewrite-static-analysis#157 · Opened Aug 22, 2023

openrewrite/rewrite-static-analysis

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