diff --git a/tools/compile-classes.sh b/tools/compile-classes.sh
new file mode 100755
index 0000000..86a4ff7
--- /dev/null
+++ b/tools/compile-classes.sh
@@ -0,0 +1,50 @@
+#!/bin/bash
+#
+# Copyright (C) 2020 The Android Open Source Project
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# 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.
+
+#
+# This script compiles Java Language source files into arm64 odex files.
+#
+# Before running this script, do lunch and build for an arm64 device.
+#
+# Usage:
+#     compile-classes.sh Scratch.java
+
+set -e
+
+SCRATCH=`mktemp -d`
+DEX_FILE=classes.dex
+ODEX_FILE=classes.odex
+
+javac -d $SCRATCH $1
+d8 $SCRATCH/*.class
+
+$ANDROID_BUILD_TOP/art/tools/compile-jar.sh $DEX_FILE $ODEX_FILE arm64 \
+    --generate-debug-info \
+    --dump-cfg=classes.cfg
+
+rm -rf $SCRATCH
+
+echo
+echo "OAT file is at $ODEX_FILE"
+echo
+echo "View it with one of the following commands:"
+echo
+echo "    oatdump --oat-file=$ODEX_FILE"
+echo
+echo "    aarch64-linux-android-objdump -d $ODEX_FILE"
+echo
+echo "The CFG is dumped to output.cfg for inspection of individual compiler passes."
+echo