Fix `rules_java` import/export setup

PiperOrigin-RevId: 535255881
Change-Id: I191446e4a988b4e49782b03d2b47815f669af665

distro/BUILD.bazel

diff --git a/distro/BUILD.bazel b/distro/BUILD.bazel
index 71352e8..d136ca1 100644
--- a/distro/BUILD.bazel
+++ b/distro/BUILD.bazel
@@ -1,6 +1,6 @@
-load("@rules_java//java:defs.bzl", "version")
 load("@rules_pkg//:pkg.bzl", "pkg_tar")
 load("@rules_pkg//releasing:defs.bzl", "print_rel_notes")
+load("//java:defs.bzl", "version")
 
 package(
     default_visibility = ["//visibility:private"],

examples/hello_world/BUILD

diff --git a/examples/hello_world/BUILD b/examples/hello_world/BUILD
index 96b2a5f..282e2d7 100644
--- a/examples/hello_world/BUILD
+++ b/examples/hello_world/BUILD
@@ -2,6 +2,6 @@
 
 java_binary(
     name = "hello_world",
-    srcs = ["HelloWorld.java"],
-    main_class = "HelloWorld",
+    srcs = ["com/google/HelloWorld.java"],
+    main_class = "com.google.HelloWorld",
 )

examples/hello_world/com/google/HelloWorld.java

diff --git a/examples/hello_world/HelloWorld.java b/examples/hello_world/com/google/HelloWorld.java
similarity index 93%
rename from examples/hello_world/HelloWorld.java
rename to examples/hello_world/com/google/HelloWorld.java
index 20331e4..5104eb0 100644
--- a/examples/hello_world/HelloWorld.java
+++ b/examples/hello_world/com/google/HelloWorld.java
@@ -11,8 +11,12 @@
 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 // See the License for the specific language governing permissions and
 // limitations under the License.
+package com.google;
 
 public class HelloWorld {
+
+  private HelloWorld() {}
+
   public static void main (String[] args) {
     System.out.println("Hello World!\n");
   }

toolchains/BUILD

diff --git a/toolchains/BUILD b/toolchains/BUILD
index 09211a4..6ef4b62 100644
--- a/toolchains/BUILD
+++ b/toolchains/BUILD
@@ -1,6 +1,6 @@
 load("@rules_cc//cc:defs.bzl", "cc_library")
 load(
-    "//toolchains:default_java_toolchain.bzl",
+    ":default_java_toolchain.bzl",
     "DEFAULT_TOOLCHAIN_CONFIGURATION",
     "PREBUILT_TOOLCHAIN_CONFIGURATION",
     "bootclasspath",
@@ -8,7 +8,7 @@
     "java_runtime_files",
 )
 load(
-    "//toolchains:java_toolchain_alias.bzl",
+    ":java_toolchain_alias.bzl",
     "java_host_runtime_alias",
     "java_runtime_alias",
     "java_runtime_version_alias",
@@ -108,6 +108,7 @@
         "@bazel_tools//src/conditions:windows": ["include/win32"],
         "//conditions:default": [],
     }),
+    tags = ["nobuilder"],
 )
 
 [

toolchains/default_java_toolchain.bzl

diff --git a/toolchains/default_java_toolchain.bzl b/toolchains/default_java_toolchain.bzl
index 919b327..9442c5e 100644
--- a/toolchains/default_java_toolchain.bzl
+++ b/toolchains/default_java_toolchain.bzl
@@ -14,7 +14,7 @@
 
 """Rules for defining default_java_toolchain"""
 
-load("@rules_java//java:defs.bzl", "java_toolchain")
+load("//java:defs.bzl", "java_toolchain")
 
 # JVM options, without patching java.compiler and jdk.compiler modules.
 BASE_JDK9_JVM_OPTS = [

toolchains/local_java_repository.bzl

diff --git a/toolchains/local_java_repository.bzl b/toolchains/local_java_repository.bzl
index faaced5..7cba8f5 100644
--- a/toolchains/local_java_repository.bzl
+++ b/toolchains/local_java_repository.bzl
@@ -14,7 +14,7 @@
 
 """Rules for importing and registering a local JDK."""
 
-load("@rules_java//java:defs.bzl", "java_runtime")
+load("//java:defs.bzl", "java_runtime")
 load(":default_java_toolchain.bzl", "default_java_toolchain")
 
 def _detect_java_version(repository_ctx, java_bin):