diff --git a/dist/cleanup/index.js b/dist/cleanup/index.js
index 1822cce2..79ad0b5f 100644
--- a/dist/cleanup/index.js
+++ b/dist/cleanup/index.js
@@ -94704,7 +94704,7 @@ function getVersionFromFileContent(content, distributionName, versionFile) {
     const versionFileName = getFileName(versionFile);
     if (versionFileName == '.tool-versions') {
         javaVersionRegExp =
-            /^(java\s+)(?:\S*-)?v?(?<version>(\d+)(\.\d+)?(\.\d+)?(\+\d+)?(-ea(\.\d+)?)?)$/m;
+            /^java\s+(?:\S*-)?(?<version>\d+(?:\.\d+)*([+_.-](?:openj9[-._]?\d[\w.-]*|java\d+|jre[-_\w]*|OpenJDK\d+[\w_.-]*|[a-z0-9]+))*)/im;
     }
     else {
         javaVersionRegExp = /(?<version>(?<=(^|\s|-))(\d+\S*))(\s|$)/;
diff --git a/dist/setup/index.js b/dist/setup/index.js
index d478f3e8..c4e8ec9e 100644
--- a/dist/setup/index.js
+++ b/dist/setup/index.js
@@ -132739,7 +132739,7 @@ function getVersionFromFileContent(content, distributionName, versionFile) {
     const versionFileName = getFileName(versionFile);
     if (versionFileName == '.tool-versions') {
         javaVersionRegExp =
-            /^(java\s+)(?:\S*-)?v?(?<version>(\d+)(\.\d+)?(\.\d+)?(\+\d+)?(-ea(\.\d+)?)?)$/m;
+            /^java\s+(?:\S*-)?(?<version>\d+(?:\.\d+)*([+_.-](?:openj9[-._]?\d[\w.-]*|java\d+|jre[-_\w]*|OpenJDK\d+[\w_.-]*|[a-z0-9]+))*)/im;
     }
     else {
         javaVersionRegExp = /(?<version>(?<=(^|\s|-))(\d+\S*))(\s|$)/;
diff --git a/docs/advanced-usage.md b/docs/advanced-usage.md
index 226ef1f9..a8a0cc06 100644
--- a/docs/advanced-usage.md
+++ b/docs/advanced-usage.md
@@ -614,5 +614,9 @@ major versions: 8, 11, 16, 17, 21
 more specific versions: 8.0.282+8, 8.0.232, 11.0, 11.0.4, 17.0
 early access (EA) versions: 15-ea, 15.0.0-ea
 versions with specified distribution: openjdk64-11.0.2
+LTS versions : temurin-21.0.5+11.0.LTS
 ```
 If the file contains multiple versions, only the first one will be recognized.
+
+***NOTE***:
+For the tool-version file, ensure that you use standard semantic versioning (semver) formats, as non-standard formats (such as jetbrains-21b212.1) may not be parsed correctly. Additionally, for complex version strings containing multiple version-like segments (for example, java semeru-openj9-11.0.15+10_openj9-0.32.0), the extraction logic may incorrectly capture the last segment (0.32.0) instead of the main version (11.0.15+10).
\ No newline at end of file
diff --git a/package-lock.json b/package-lock.json
index 336c19e7..caa9b27b 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,3 +1,4 @@
+
 {
   "name": "setup-java",
   "version": "5.0.0",
diff --git a/package.json b/package.json
index bccf0321..4cec84d9 100644
--- a/package.json
+++ b/package.json
@@ -60,4 +60,4 @@
     "url": "https://github.com/actions/setup-java/issues"
   },
   "homepage": "https://github.com/actions/setup-java#readme"
-}
+}
\ No newline at end of file
diff --git a/src/util.ts b/src/util.ts
index af75aaac..9e5f2f66 100644
--- a/src/util.ts
+++ b/src/util.ts
@@ -133,7 +133,7 @@ export function getVersionFromFileContent(
   const versionFileName = getFileName(versionFile);
   if (versionFileName == '.tool-versions') {
     javaVersionRegExp =
-      /^(java\s+)(?:\S*-)?v?(?<version>(\d+)(\.\d+)?(\.\d+)?(\+\d+)?(-ea(\.\d+)?)?)$/m;
+      /^java\s+(?:\S*-)?(?<version>\d+(?:\.\d+)*([+_.-](?:openj9[-._]?\d[\w.-]*|java\d+|jre[-_\w]*|OpenJDK\d+[\w_.-]*|[a-z0-9]+))*)/im;
   } else {
     javaVersionRegExp = /(?<version>(?<=(^|\s|-))(\d+\S*))(\s|$)/;
   }