The use of stack that comes with java

import java.util.Stack;

class ReorderStack<T> extends Stack<T>
{
  public T push(T paramT)
  {
    Object localObject;
    if (!contains(paramT))
    {
      localObject = super.push(paramT);
      return localObject;
    }
    for (int i = -1 + size(); ; i--)
      if (i >= 0)
      {
        if (paramT.equals(get(i)))
          remove(i);
      }
      else
      {
        int j = size();
        if ((i >= 1) && (i < j) && (get(i - 1).equals(get(i))))
          remove(i);
        localObject = super.push(paramT);
        break;
      }
  }