diff --git a/CHANGELOG.md b/CHANGELOG.md
index 2ee6e2e8..8ac7d1a1 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -68,6 +68,10 @@ Status of the `main` branch. Changes prior to the next official version change w
   - `Java`: invalidate JDTLS workspace cache when Java import settings change #1576
   - `Java`: use `JAVA_HOME` for Gradle import when `use_system_java_home` is enabled and `gradle_java_home`
     is unset. #1657
+  - `Java`: stop hard-ignoring directories named `target`/`build`/`bin`/`out`/`classes`/`dist`/`lib` in
+    `EclipseJDTLS`. These are all valid Java package identifiers, so ignoring them by name hid legitimate
+    source from the symbol tools even when they were not gitignored. Removed the hardcoded override; real
+    build output is already excluded via `.gitignore`. #1645
   - Improve quoting of arguments in shell executions
   - Add **LaTeX** support (experimental) via [texlab](https://github.com/latex-lsp/texlab).
   - PHP: add support for PHPantom as alternative to the already supported PHP LS #1554.
diff --git a/src/solidlsp/language_servers/eclipse_jdtls.py b/src/solidlsp/language_servers/eclipse_jdtls.py
index 8c85998d..1539002b 100644
--- a/src/solidlsp/language_servers/eclipse_jdtls.py
+++ b/src/solidlsp/language_servers/eclipse_jdtls.py
@@ -254,24 +254,6 @@ class EclipseJDTLS(SolidLanguageServer):
         ls_resources_dir = self.ls_resources_dir(self._solidlsp_settings)
         return self.DependencyProvider(self._custom_settings, ls_resources_dir, self._solidlsp_settings, self.repository_root_path)
 
-    @override
-    def is_ignored_dirname(self, dirname: str) -> bool:
-        # Ignore common Java build directories from different build tools:
-        # - Maven: target
-        # - Gradle: build, .gradle
-        # - Eclipse: bin, .settings
-        # - IntelliJ IDEA: out, .idea
-        # - General: classes, dist, lib
-        return super().is_ignored_dirname(dirname) or dirname in [
-            "target",  # Maven
-            "build",  # Gradle
-            "bin",  # Eclipse
-            "out",  # IntelliJ IDEA
-            "classes",  # General
-            "dist",  # General
-            "lib",  # General
-        ]
-
     class DependencyProvider(LanguageServerDependencyProvider):
         def __init__(
             self,
diff --git a/test/solidlsp/java/test_jdtls_path_resolution.py b/test/solidlsp/java/test_jdtls_path_resolution.py
index 3492134a..7e7cd71c 100644
--- a/test/solidlsp/java/test_jdtls_path_resolution.py
+++ b/test/solidlsp/java/test_jdtls_path_resolution.py
@@ -615,3 +615,32 @@ class TestComputeWorkspaceHash:
         configured_hash = EclipseJDTLS.DependencyProvider._compute_workspace_hash(self.REPO, self.DEFAULT_LAUNCHER, settings)
 
         assert configured_hash != legacy_hash
+
+
+# ----------------------------------------------------------------------------
+# is_ignored_dirname (directory-traversal filter)
+# ----------------------------------------------------------------------------
+
+
+class TestIsIgnoredDirname:
+    """Regression for #1645: the Java language server must not hard-ignore directories whose names
+    collide with build-tool output (``lib``, ``dist``, ``classes``, ``out``, ...). Those are all
+    valid Java package identifiers, so ignoring them by name hid legitimate source from the symbol
+    tools even when ``git check-ignore`` reported nothing. Real build output is already filtered via
+    ``.gitignore``, so directory traversal should only skip the language-agnostic
+    ``_ALWAYS_IGNORED_DIRS`` (VCS/venv/cache/IDE internals) inherited from the base language server.
+    """
+
+    @pytest.fixture
+    def jdtls(self) -> EclipseJDTLS:
+        # is_ignored_dirname only reads the class-level _ALWAYS_IGNORED_DIRS, so an uninitialized
+        # instance is sufficient here (no Java or JDTLS process required).
+        return object.__new__(EclipseJDTLS)
+
+    @pytest.mark.parametrize("dirname", ["lib", "dist", "classes", "out", "target", "build", "bin"])
+    def test_valid_package_dirnames_are_not_ignored(self, jdtls: EclipseJDTLS, dirname: str) -> None:
+        assert jdtls.is_ignored_dirname(dirname) is False
+
+    @pytest.mark.parametrize("dirname", [".git", ".venv", ".idea", ".serena", ".mypy_cache"])
+    def test_always_ignored_dirs_are_still_ignored(self, jdtls: EclipseJDTLS, dirname: str) -> None:
+        assert jdtls.is_ignored_dirname(dirname) is True