Cannot stop ant from generating compiler Sun proprietary API warnings

Question

I call javac from my ant script like this:

Answer 1

To prevent deprecation warnings I tried to do it using JDK 6 and JDK 7.

With JDK 7, @Deprecated annotation does the work

With JDK 6, it does not work, neither adding -Xlint:-deprecation param works for me. The only way I managed to remove the warning was using the @deprecated Javadoc Tag:

  /**
   * @deprecated
   */
  @Override
  public void removeValue(String arg0) {
    // TODO Auto-generated method stub
  }