diff --git a/examples/hello_world/BUILD.bazel b/examples/hello_world/BUILD
similarity index 100%
rename from examples/hello_world/BUILD.bazel
rename to examples/hello_world/BUILD
diff --git a/java/BUILD.bazel b/java/BUILD
similarity index 100%
rename from java/BUILD.bazel
rename to java/BUILD
diff --git a/java/private/BUILD b/java/private/BUILD
new file mode 100644
index 0000000..9f50995
--- /dev/null
+++ b/java/private/BUILD
@@ -0,0 +1,15 @@
+load("@bazel_skylib//:bzl_library.bzl", "bzl_library")
+
+licenses(["notice"])
+
+bzl_library(
+    name = "private",
+    srcs = ["native.bzl"],
+    visibility = ["//java:__pkg__"],
+)
+
+filegroup(
+    name = "srcs",
+    srcs = glob(["**"]),
+    visibility = ["//java:__pkg__"],
+)
diff --git a/toolchains/BUILD b/toolchains/BUILD
new file mode 100644
index 0000000..563c667
--- /dev/null
+++ b/toolchains/BUILD
@@ -0,0 +1,282 @@
+load("@rules_cc//cc:defs.bzl", "cc_library")
+load(
+    "//toolchains:default_java_toolchain.bzl",
+    "DEFAULT_TOOLCHAIN_CONFIGURATION",
+    "PREBUILT_TOOLCHAIN_CONFIGURATION",
+    "bootclasspath",
+    "default_java_toolchain",
+    "java_runtime_files",
+)
+load(
+    "//toolchains:java_toolchain_alias.bzl",
+    "java_host_runtime_alias",
+    "java_runtime_alias",
+    "java_runtime_version_alias",
+    "java_toolchain_alias",
+)
+
+package(default_visibility = ["//visibility:public"])
+
+licenses(["notice"])
+
+filegroup(
+    name = "srcs",
+    srcs = glob(["**"]),
+    visibility = ["//:__pkg__"],
+)
+
+# Used to distinguish toolchains used for Java development, ie the JavaToolchainProvider.
+# TODO: migrate away from using @bazel_tools//tools/jdk:toolchain_type ?
+# toolchain_type(name = "toolchain_type")
+
+# Used to distinguish toolchains used for Java execution, ie the JavaRuntimeInfo.
+# TODO: migrate away from using @bazel_tools//tools/jdk:runtime_toolchain_type ?
+# toolchain_type(name = "runtime_toolchain_type")
+
+# Points to toolchain[":runtime_toolchain_type"] (was :legacy_current_java_runtime)
+java_runtime_alias(name = "current_java_runtime")
+
+# Host configuration of ":current_java_runtime"
+java_host_runtime_alias(name = "current_host_java_runtime")
+
+# Points to toolchain[":toolchain_type"] (was :legacy_current_java_toolchain)
+java_toolchain_alias(name = "current_java_toolchain")
+
+# These individual jni_* targets are exposed for legacy reasons.
+# Most users should depend on :jni.
+
+java_runtime_files(
+    name = "jni_header",
+    srcs = ["include/jni.h"],
+)
+
+java_runtime_files(
+    name = "jni_md_header-darwin",
+    srcs = ["include/darwin/jni_md.h"],
+)
+
+java_runtime_files(
+    name = "jni_md_header-linux",
+    srcs = ["include/linux/jni_md.h"],
+)
+
+java_runtime_files(
+    name = "jni_md_header-windows",
+    srcs = ["include/win32/jni_md.h"],
+)
+
+java_runtime_files(
+    name = "jni_md_header-freebsd",
+    srcs = ["include/freebsd/jni_md.h"],
+)
+
+java_runtime_files(
+    name = "jni_md_header-openbsd",
+    srcs = ["include/openbsd/jni_md.h"],
+)
+
+# The Java native interface. Depend on this package if you #include <jni.h>.
+#
+# See test_jni in third_party/bazel/src/test/shell/bazel/bazel_java_test.sh for
+# an example of using Bazel to build a Java program that calls a C function.
+#
+# TODO(ilist): use //src:condition:linux when released in Bazel
+cc_library(
+    name = "jni",
+    hdrs = [":jni_header"] + select({
+        "@bazel_tools//src/conditions:darwin": [":jni_md_header-darwin"],
+        "@bazel_tools//src/conditions:freebsd": [":jni_md_header-freebsd"],
+        "@bazel_tools//src/conditions:linux_aarch64": [":jni_md_header-linux"],
+        "@bazel_tools//src/conditions:linux_mips64": [":jni_md_header-linux"],
+        "@bazel_tools//src/conditions:linux_ppc64le": [":jni_md_header-linux"],
+        "@bazel_tools//src/conditions:linux_riscv64": [":jni_md_header-linux"],
+        "@bazel_tools//src/conditions:linux_s390x": [":jni_md_header-linux"],
+        "@bazel_tools//src/conditions:linux_x86_64": [":jni_md_header-linux"],
+        "@bazel_tools//src/conditions:openbsd": [":jni_md_header-openbsd"],
+        "@bazel_tools//src/conditions:windows": [":jni_md_header-windows"],
+        "//conditions:default": [],
+    }),
+    includes = ["include"] + select({
+        "@bazel_tools//src/conditions:darwin": ["include/darwin"],
+        "@bazel_tools//src/conditions:freebsd": ["include/freebsd"],
+        "@bazel_tools//src/conditions:linux_aarch64": ["include/linux"],
+        "@bazel_tools//src/conditions:linux_mips64": [":include/linux"],
+        "@bazel_tools//src/conditions:linux_ppc64le": ["include/linux"],
+        "@bazel_tools//src/conditions:linux_riscv64": [":include/linux"],
+        "@bazel_tools//src/conditions:linux_s390x": ["include/linux"],
+        "@bazel_tools//src/conditions:linux_x86_64": ["include/linux"],
+        "@bazel_tools//src/conditions:openbsd": ["include/openbsd"],
+        "@bazel_tools//src/conditions:windows": ["include/win32"],
+        "//conditions:default": [],
+    }),
+)
+
+[
+    (
+        alias(
+            name = "ijar_prebuilt_binary_%s" % OS,
+            actual = "@remote_java_tools_%s//:ijar_prebuilt_binary" % OS,
+            visibility = ["//visibility:private"],
+        ),
+        alias(
+            name = "prebuilt_singlejar_%s" % OS,
+            actual = "@remote_java_tools_%s//:prebuilt_singlejar" % OS,
+            visibility = ["//visibility:private"],
+        ),
+    )
+    for OS in [
+        "linux",
+        "darwin_x86_64",
+        "darwin_arm64",
+        "windows",
+    ]
+]
+
+# On Windows, executables end in ".exe", but the label we reach it through
+# must be platform-independent. Thus, we create a little filegroup that
+# contains the appropriate platform-dependent file.
+alias(
+    name = "ijar",
+    actual = ":ijar_prebuilt_binary_or_cc_binary",
+)
+
+alias(
+    name = "ijar_prebuilt_binary_or_cc_binary",
+    actual = select({
+        "@bazel_tools//src/conditions:darwin_arm64": ":ijar_prebuilt_binary_darwin_arm64",
+        "@bazel_tools//src/conditions:darwin_x86_64": ":ijar_prebuilt_binary_darwin_x86_64",
+        "@bazel_tools//src/conditions:linux_x86_64": ":ijar_prebuilt_binary_linux",
+        "@bazel_tools//src/conditions:windows": ":ijar_prebuilt_binary_windows",
+        "//conditions:default": "@remote_java_tools//:ijar_cc_binary",
+    }),
+)
+
+alias(
+    name = "ijar_prebuilt_binary",
+    actual = select({
+        "@bazel_tools//src/conditions:darwin_arm64": ":ijar_prebuilt_binary_darwin_arm64",
+        "@bazel_tools//src/conditions:darwin_x86_64": ":ijar_prebuilt_binary_darwin_x86_64",
+        "@bazel_tools//src/conditions:linux_x86_64": ":ijar_prebuilt_binary_linux",
+        "@bazel_tools//src/conditions:windows": ":ijar_prebuilt_binary_windows",
+    }),
+)
+
+# On Windows, Java implementation of singlejar is used. We create a little
+# filegroup that contains the appropriate platform-dependent file.
+# Once https://github.com/bazelbuild/bazel/issues/2241 is fixed (that is,
+# the native singlejar is used on windows), this file group can be reused since
+# on Windows, executables end in ".exe", but the label we reach it through
+# must be platform-independent.
+alias(
+    name = "singlejar",
+    actual = ":singlejar_prebuilt_or_cc_binary",
+)
+
+alias(
+    name = "singlejar_prebuilt_or_cc_binary",
+    actual = select({
+        "@bazel_tools//src/conditions:darwin_arm64": ":prebuilt_singlejar_darwin_arm64",
+        "@bazel_tools//src/conditions:darwin_x86_64": ":prebuilt_singlejar_darwin_x86_64",
+        "@bazel_tools//src/conditions:linux_x86_64": ":prebuilt_singlejar_linux",
+        "@bazel_tools//src/conditions:windows": ":prebuilt_singlejar_windows",
+        "//conditions:default": "@remote_java_tools//:singlejar_cc_bin",
+    }),
+)
+
+alias(
+    name = "prebuilt_singlejar",
+    actual = select({
+        "@bazel_tools//src/conditions:darwin_arm64": ":prebuilt_singlejar_darwin_arm64",
+        "@bazel_tools//src/conditions:darwin_x86_64": ":prebuilt_singlejar_darwin_x86_64",
+        "@bazel_tools//src/conditions:linux_x86_64": ":prebuilt_singlejar_linux",
+        "@bazel_tools//src/conditions:windows": ":prebuilt_singlejar_windows",
+    }),
+)
+
+bootclasspath(
+    name = "platformclasspath",
+    src = "DumpPlatformClassPath.java",
+    host_javabase = "current_java_runtime",
+    target_javabase = "current_java_runtime",
+)
+
+default_java_toolchain(
+    name = "toolchain",
+    configuration = DEFAULT_TOOLCHAIN_CONFIGURATION,
+    toolchain_definition = False,
+)
+
+alias(
+    name = "remote_toolchain",
+    actual = ":toolchain",
+)
+
+RELEASES = (8, 9, 10, 11)
+
+[
+    default_java_toolchain(
+        name = "toolchain_java%d" % release,
+        configuration = DEFAULT_TOOLCHAIN_CONFIGURATION,
+        source_version = "%s" % release,
+        target_version = "%s" % release,
+    )
+    for release in RELEASES
+]
+
+# A toolchain that targets java 15.
+default_java_toolchain(
+    name = "toolchain_jdk_15",
+    configuration = dict(),
+    java_runtime = "//toolchains:remotejdk_15",
+    source_version = "15",
+    target_version = "15",
+)
+
+# A toolchain that targets java 16.
+default_java_toolchain(
+    name = "toolchain_jdk_16",
+    configuration = dict(),
+    java_runtime = "//toolchains:remotejdk_16",
+    source_version = "16",
+    target_version = "16",
+)
+
+# A toolchain that targets java 17.
+default_java_toolchain(
+    name = "toolchain_jdk_17",
+    configuration = dict(),
+    java_runtime = "//toolchains:remotejdk_17",
+    source_version = "17",
+    target_version = "17",
+)
+
+default_java_toolchain(
+    name = "prebuilt_toolchain",
+    configuration = PREBUILT_TOOLCHAIN_CONFIGURATION,
+    toolchain_definition = False,
+)
+
+# A JDK 11 for use as a --host_javabase.
+java_runtime_version_alias(
+    name = "remote_jdk11",
+    runtime_version = "remotejdk_11",
+    visibility = ["//visibility:public"],
+)
+
+java_runtime_version_alias(
+    name = "remotejdk_15",
+    runtime_version = "remotejdk_15",
+    visibility = ["//visibility:public"],
+)
+
+java_runtime_version_alias(
+    name = "remotejdk_16",
+    runtime_version = "remotejdk_16",
+    visibility = ["//visibility:public"],
+)
+
+java_runtime_version_alias(
+    name = "remotejdk_17",
+    runtime_version = "remotejdk_17",
+    visibility = ["//visibility:public"],
+)