refactor: drop legacy JDK 8 version mapping in _detect_java_version

codeflash/languages/java/support.py

@@ -583,9 +583,9 @@ class JavaSupport(LanguageSupport):
                     end = line.find('"', start + 1)
                     if start != -1 and end != -1:
                         full_version = line[start + 1 : end]
-                        # Use major version only: "17.0.2" -> "17", "1.8.0_292" -> "8"
-                        major = full_version.split(".")[0]
-                        self._language_version = "8" if major == "1" else major
+                        # Use major version only: "17.0.2" -> "17". JDK 8 and earlier (reported as
+                        # "1.x.y") are unsupported — the downstream minimum-version check rejects them.
+                        self._language_version = full_version.split(".")[0]
                         return
         except Exception:
             pass

tests/test_languages/test_java/test_support.py

@@ -175,3 +175,33 @@ class TestJdkVersionCheck:
         with patch("codeflash.languages.java.support.detect_java_project", return_value=mock_config):
             result = support.ensure_runtime_environment(tmp_path)
         assert result is True
+
+    def test_detect_java_version_legacy_jdk8_format(self) -> None:
+        from unittest.mock import MagicMock, patch
+
+        support = get_java_support()
+        support._language_version = None
+
+        mock_result = MagicMock()
+        mock_result.stderr = 'openjdk version "1.8.0_292"\n'
+        mock_result.stdout = ""
+
+        with patch("subprocess.run", return_value=mock_result):
+            support._detect_java_version()
+
+        assert support._language_version == "1"
+
+    def test_detect_java_version_modern_format(self) -> None:
+        from unittest.mock import MagicMock, patch
+
+        support = get_java_support()
+        support._language_version = None
+
+        mock_result = MagicMock()
+        mock_result.stderr = 'openjdk version "17.0.2"\n'
+        mock_result.stdout = ""
+
+        with patch("subprocess.run", return_value=mock_result):
+            support._detect_java_version()
+
+        assert support._language_version == "17"