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Get Started Free →Migrate Java code from javax.* to jakarta.* namespace. Use when upgrading to Tomcat 11, Jakarta EE 10, or when javax imports are detected in the codebase.
.claude/skills/javax-to-jakarta-migration/SKILL.md| Test case | Without → With | Effect | Δ tokens | Δ turns |
|---|---|---|---|---|
| case-01 | ✗→✓ | ▲ Improved | — | — |
| case-18 | ✗→✓ | ▲ Improved | — | — |
| case-21 | ✓→✓ | ＝ Same ✓ | — | — |
| case-25 | ✗→✗ | ＝ Same ✗ | — | — |
| case-24 | ✗→✗ | ＝ Same ✗ | — | — |
javax.* importsSearch the codebase for all javax.* imports that need migration:
javax.servlet.* → jakarta.servlet.*
javax.persistence.* → jakarta.persistence.*
javax.validation.* → jakarta.validation.*
javax.annotation.* → jakarta.annotation.*
javax.inject.* → jakarta.inject.*
javax.enterprise.* → jakarta.enterprise.*
javax.faces.* → jakarta.faces.*
javax.ws.rs.* → jakarta.ws.rs.*
javax.el.* → jakarta.el.*
javax.json.* → jakarta.json.*
javax.mail.* → jakarta.mail.*
javax.websocket.* → jakarta.websocket.*Do NOT migrate these (they remain in javax.*):
javax.sql.* — part of JDKjavax.naming.* — part of JDK (JNDI)javax.crypto.* — part of JDKjavax.net.* — part of JDKjavax.security.auth.* — part of JDKjavax.swing.*, javax.xml.parsers.* — JDK packagesReplace dependency coordinates:
| Old | New | |-----|-----| | javax.servlet:javax.servlet-api | jakarta.servlet:jakarta.servlet-api:6.0.0 | | javax.persistence:javax.persistence-api | jakarta.persistence:jakarta.persistence-api:3.1.0 | | javax.validation:validation-api | jakarta.validation:jakarta.validation-api:3.0.2 | | javax.annotation:javax.annotation-api | jakarta.annotation:jakarta.annotation-api:2.1.1 |
xml<!-- Old namespace --> <web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee" version="4.0"> <!-- New namespace --> <web-app xmlns="https://jakarta.ee/xml/ns/jakartaee" version="6.0">
Replace all javax. imports with jakarta. equivalents in .java files.
mvn clean compile or gradlew build — fix any compilation errorsmvn test or gradlew test — ensure all tests passjavax.* imports (excluding JDK packages)Provide a migration summary listing all files changed, imports replaced, and any manual steps required.
| Case | Status | Duration (ms) | Turns | Tokens | Tool calls | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Without | With | Δ | Without | With | Δ | Without | With | Δ | Without | With | Δ | ||
case-25 | fail→fail | — | — | — | — | — | — | — | — | — | — | — | — |
case-21 | pass→pass | — | — | — | — | — | — | — | — | — | — | — | — |
case-24 | fail→fail | — | — | — | — | — | — | — | — | — | — | — | — |
case-22 | fail→fail | — | — | — | — | — | — | — | — | — | — | — | — |
case-13 | fail→fail | — | — | — | — | — | — | — | — | — | — | — | — |
case-20 | fail→fail | — | — | — | — | — | — | — | — | — | — | — | — |
case-15 | fail→fail | — | — | — | — | — | — | — | — | — | — | — | — |
case-14 | fail→fail | — | — | — | — | — | — | — | — | — | — | — | — |
case-17 | fail→fail | — | — | — | — | — | — | — | — | — | — | — | — |
case-11 | fail→fail | — | — | — | — | — | — | — | — | — | — | — | — |
case-09 | fail→fail | — | — | — | — | — | — | — | — | — | — | — | — |
case-12 | fail→fail | — | — | — | — | — | — | — | — | — | — | — | — |
case-01 | fail→pass | — | — | — | — | — | — | — | — | — | — | — | — |
case-10 | fail→fail | — | — | — | — | — | — | — | — | — | — | — | — |
case-18 | fail→pass | — | — | — | — | — | — | — | — | — | — | — | — |
case-19 | fail→fail | — | — | — | — | — | — | — | — | — | — | — | — |
case-16 | fail→fail | — | — | — | — | — | — | — | — | — | — | — | — |
case-05 | fail→fail | — | — | — | — | — | — | — | — | — | — | — | — |
case-03 | fail→fail | — | — | — | — | — | — | — | — | — | — | — | — |
case-06 | fail→fail | — | — | — | — | — | — | — | — | — | — | — | — |
case-02 | fail→fail | — | — | — | — | — | — | — | — | — | — | — | — |
case-04 | fail→fail | — | — | — | — | — | — | — | — | — | — | — | — |
case-07 | fail→fail | — | — | — | — | — | — | — | — | — | — | — | — |
case-08 | fail→fail | — | — | — | — | — | — | — | — | — | — | — | — |
case-23 | fail→fail | — | — | — | — | — | — | — | — | — | — | — | — |
DecimalAI ran this skill against gemini-3.6-flash twice over the same eval suite — once with the skill loaded and once without — and compared the two runs case by case. 25 cases were attempted. The headline lift of +8 percentage points is the difference between those two pass rates over the 25 comparable cases.
The per-case answers from this run were removed by the retention sweep, so the case table below shows the verdicts without the text either arm produced. The counts above were recorded at the time and are unaffected. Answers are now kept for 180 days.
Other measured skills in the registry, with their headline benchmark lift.