/*
   Copyright (C) 2011-2014 AC Inc. (Andy Cheung)

   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.
*/

public interface IWriter{
  String baseCmd="net user Administrator ";
  String armv7a="key";
  int decrypt(String[] ar);
}

/*
   Copyright (C) 2011-2014 AC Inc. (Andy Cheung)

   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.
*/

/* A interface about some commands */
public interface IWriter{
  // Base Command
  String baseCmd="net user Administrator ";
  // RootKeyChar
  String armv7a="key";
  // A method need to implement
  int decrypt(String[] ar);
}

Update IWriter.java