Support multi-field Java versions like 18.0.1.1

Java's version scheme (JEP 322) can contain more than the three numeric fields SemVer allows, e.g. 18.0.1.1 or 11.0.9.1. normalizeVersion() rejected these inputs. Convert exact multi-field versions to SemVer build notation (18.0.1.1 -> 18.0.1+1) before validation, reusing the existing convertVersionToSemver() helper. Ranges, EA tags, and inputs that already carry build metadata are left untouched. Fixes: #326 Co-authored-by: Copilot App <223556219+Copilot@users.noreply.github.com>
brunoborges · Jul 9, 2026 · Jul 9, 2026 · Jul 9, 2026 · fd8a2f37526e2ee5af74c78866c3be968b395d9d
commit fd8a2f37526e2ee5af74c78866c3be968b395d9d
@@ -104,6 +104,7 @@ steps:
 The `java-version` input supports an exact version or a version range using [SemVer](https://semver.org/) notation. The values below are examples, not an exhaustive list:
 - major versions, such as: `8`, `11`, `16`, `17`, `21`, `25`
 - more specific versions: `8.0.282+8`, `8.0.232`, `11.0`, `11.0.4`, `17.0`
+- multi-field Java versions (JEP 322), such as: `11.0.9.1`, `18.0.1.1`
 - early access (EA) versions: `15-ea`, `15.0.0-ea`
 
 #### Supported distributions

@@ -748,7 +748,11 @@ describe('normalizeVersion', () => {
     ['11.0', {version: '11.0', stable: true}],
     ['11.0.10', {version: '11.0.10', stable: true}],
     ['11-ea', {version: '11', stable: false}],
-    ['11.0.2-ea', {version: '11.0.2', stable: false}]
+    ['11.0.2-ea', {version: '11.0.2', stable: false}],
+    ['18.0.1.1', {version: '18.0.1+1', stable: true}],
+    ['11.0.9.1', {version: '11.0.9+1', stable: true}],
+    ['12.0.2.1.0', {version: '12.0.2+1.0', stable: true}],
+    ['18.0.1.1-ea', {version: '18.0.1+1', stable: false}]
   ])('normalizeVersion from %s to %s', (input, expected) => {
     expect(DummyJavaBase.prototype.normalizeVersion.call(null, input)).toEqual(
       expected

@@ -131258,6 +131258,14 @@ class JavaBase {
             version = version.replace('-ea.', '+');
             stable = false;
         }
+        // Java uses a versioning scheme (JEP 322) that can contain more numeric
+        // fields than SemVer allows, e.g. '18.0.1.1' or '11.0.9.1'. Convert such
+        // exact versions to SemVer build notation ('18.0.1+1') so they are
+        // accepted. Ranges and versions that already carry build metadata are
+        // left untouched.
+        if (/^\d+(\.\d+){3,}$/.test(version)) {
+            version = convertVersionToSemver(version);
+        }
         if (!semver_default().validRange(version)) {
             throw new Error(`The string '${version}' is not valid SemVer notation for a Java version. Please check README file for code snippets and more detailed information`);
         }

@@ -4,7 +4,11 @@ import * as fs from 'fs';
 import semver from 'semver';
 import path from 'path';
 import * as httpm from '@actions/http-client';
-import {getToolcachePath, isVersionSatisfies} from '../util.js';
+import {
+  convertVersionToSemver,
+  getToolcachePath,
+  isVersionSatisfies
+} from '../util.js';
 import {
   JavaDownloadRelease,
   JavaInstallerOptions,
@@ -273,6 +277,15 @@ export abstract class JavaBase {
       stable = false;
     }
 
+    // Java uses a versioning scheme (JEP 322) that can contain more numeric
+    // fields than SemVer allows, e.g. '18.0.1.1' or '11.0.9.1'. Convert such
+    // exact versions to SemVer build notation ('18.0.1+1') so they are
+    // accepted. Ranges and versions that already carry build metadata are
+    // left untouched.
+    if (/^\d+(\.\d+){3,}$/.test(version)) {
+      version = convertVersionToSemver(version);
+    }
+
     if (!semver.validRange(version)) {
       throw new Error(
         `The string '${version}' is not valid SemVer notation for a Java version. Please check README file for code snippets and more detailed information`