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diff --git a/sample/src/main/java/com/google/archivepatcher/sample/SamplePatchApplier.java b/sample/src/main/java/com/google/archivepatcher/sample/SamplePatchApplier.java
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+// Copyright 2016 Google Inc. All rights reserved.
+//
+// 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.
+
+package com.google.archivepatcher.sample;
+
+import com.google.archivepatcher.applier.FileByFileV1DeltaApplier;
+import com.google.archivepatcher.shared.DefaultDeflateCompatibilityWindow;
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.FileOutputStream;
+import java.util.zip.Inflater;
+import java.util.zip.InflaterInputStream;
+
+/** Apply a patch; args are old file path, patch file path, and new file path. */
+public class SamplePatchApplier {
+  public static void main(String... args) throws Exception {
+    if (!new DefaultDeflateCompatibilityWindow().isCompatible()) {
+      System.err.println("zlib not compatible on this system");
+      System.exit(-1);
+    }
+    File oldFile = new File(args[0]); // must be a zip archive
+    Inflater uncompressor = new Inflater(true);
+    try (FileInputStream compressedPatchIn = new FileInputStream(args[1]);
+        InflaterInputStream patchIn =
+            new InflaterInputStream(compressedPatchIn, uncompressor, 32768);
+        FileOutputStream newFileOut = new FileOutputStream(args[2])) {
+      new FileByFileV1DeltaApplier().applyDelta(oldFile, patchIn, newFileOut);
+    } finally {
+      uncompressor.end();
+    }
+  }
+}