src/java.base/share/classes/java/util/jar/Pack200.java

@@ -702,11 +702,13 @@
                     impl = com.sun.java.util.jar.pack.PackerImpl.class;
                 else
                     impl = com.sun.java.util.jar.pack.UnpackerImpl.class;
             }
             // We have a class.  Now instantiate it.
-            return impl.newInstance();
+            @SuppressWarnings("deprecation")
+            Object result = impl.newInstance();
+            return result;
         } catch (ClassNotFoundException e) {
             throw new Error("Class not found: " + implName +
                                 ":\ncheck property " + prop +
                                 " in your properties file.", e);
         } catch (InstantiationException e) {