code: public void put(SimpleEntry simpleEntry)
    {
      if (TraceComponent.isAnyTracingEnabled() && tc.isEntryEnabled())
        SibTr.entry(this, tc, "put", simpleEntry);
      
      simpleEntry.previous = last;
      simpleEntry.list = this;
      
      if(last != null)
        last.next = simpleEntry;
      else
        first = simpleEntry;
        
      last = simpleEntry;
  
      if (TraceComponent.isAnyTracingEnabled() && tc.isEntryEnabled())
        SibTr.exit(this, tc, "put", printList());
    }
docs: Add an entry to the list
  @param simpleEntry