diff --git a/jpype/_core.pyi b/jpype/_core.pyi
new file mode 100644
index 000000000..f4eb32c79
--- /dev/null
+++ b/jpype/_core.pyi
@@ -0,0 +1,2 @@
+class _JRuntime:
+    pass
diff --git a/jpype/_jcollection.pyi b/jpype/_jcollection.pyi
new file mode 100644
index 000000000..7e811332f
--- /dev/null
+++ b/jpype/_jcollection.pyi
@@ -0,0 +1,93 @@
+from typing import Iterable, Collection, List, Set, Mapping, Tuple, TypeVar, Iterator, Generator, Union, overload
+
+E = TypeVar('E')
+K = TypeVar('K')
+V = TypeVar('V')
+
+
+class _JIterable(Iterable[E]):
+    def __iter__(self) -> Iterator[E]: ...
+
+
+class _JCollection(Collection[E]):
+    def __len__(self) -> int: ...
+
+    def __delitem__(self, i: E) -> None: ...
+
+    def __contains__(self, i: E) -> bool: ...
+
+
+class _JList(List[E]):
+    @overload
+    def __getitem__(self, ndx: int) -> E: ...
+
+    @overload
+    def __getitem__(self, ndx: slice) -> E: ...
+
+    def __setitem__(self, ndx: int, v: E) -> None: ...
+
+    def __delitem__(self, ndx: int) -> E: ...
+
+    def __reversed__(self) -> Generator[E, None, None]: ...
+
+    def index(self, obj: E) -> int: ...
+
+    def count(self, obj: E) -> int: ...
+
+    def insert(self, idx: int, obj: E) -> '_JList'[E]: ...
+
+    def append(self, obj: E) -> '_JList'[E]: ...
+
+    def reverse(self) -> None: ...
+
+    def extend(self, lst: Iterable[E]) -> None: ...
+
+    def pop(self, idx: int = ...) -> E: ...
+
+    def __iadd__(self, obj: List[E]) -> '_JList'[E]: ...
+
+    def __add__(self, obj: List[E]) -> '_JList'[E]: ...
+
+    def remove(self, obj: E) -> None: ...
+
+
+class _JMap(Mapping[K, V]):
+    def __len__(self) -> int: ...
+
+    def __iter__(self) -> Iterator[K]: ...
+
+    def __delitem__(self, i: K) -> V: ...
+
+    def __getitem__(self, ndx: K) -> V: ...
+
+    def __setitem__(self, ndx: K, v: V) -> None: ...
+
+    def items(self) -> Set['_JMapEntry'[K, V]]: ...
+
+    def keys(self) -> Set[K]: ...
+
+    def __contains__(self, item: V) -> bool: ...
+
+
+class _JSet(Set[E]):
+    def __delitem__(self, i: E): ...
+
+
+class _JMapEntry(Tuple[K, V]):
+    def __len__(self) -> int: ...
+
+    def __getitem__(self, x: int) -> Union[K, V]: ...
+
+
+class _JIterator(Iterator[E]):
+    def __next__(self) -> E: ...
+
+    def __iter__(self) -> Iterator[E]: ...
+
+
+class _JEnumeration(Iterator[E]):
+    def __next__(self) -> E: ...
+
+    def __iter__(self) -> Iterator[E]: ...
+
+    def next(self) -> E: ...
diff --git a/jpype/_jio.pyi b/jpype/_jio.pyi
new file mode 100644
index 000000000..64196de5f
--- /dev/null
+++ b/jpype/_jio.pyi
@@ -0,0 +1,9 @@
+from types import TracebackType
+from typing import ContextManager, Optional, Type
+
+
+class _JCloseable(ContextManager['_JCloseable']):
+    def __enter__(self) -> '_JCloseable': ...
+
+    def __exit__(self, exception_type: Optional[Type[BaseException]], exception_value: Optional[BaseException],
+                 traceback: Optional[TracebackType]) -> bool: ...
diff --git a/jpype/_jstring.pyi b/jpype/_jstring.pyi
new file mode 100644
index 000000000..bd2d5160a
--- /dev/null
+++ b/jpype/_jstring.pyi
@@ -0,0 +1,13 @@
+from typing import Any, Text
+
+
+class _JStringProto(Text):
+    def __add__(self, other: Text) -> Text: ...
+
+    def __len__(self) -> int: ...
+
+    def __getitem__(self, i: int) -> Text: ...
+
+    def __contains__(self, other: Text) -> bool: ...
+
+    def __hash__(self) -> Any: ...
diff --git a/jpype/_jthread.pyi b/jpype/_jthread.pyi
new file mode 100644
index 000000000..fbb828d3f
--- /dev/null
+++ b/jpype/_jthread.pyi
@@ -0,0 +1,12 @@
+class _JThread:
+    @staticmethod
+    def isAttached() -> bool: ...
+
+    @staticmethod
+    def attach() -> None: ...
+
+    @staticmethod
+    def attachAsDaemon() -> None: ...
+
+    @staticmethod
+    def detach() -> None: ...