public Entry(String symbol,Entry next){
  this.symbol=symbol.intern();
  characters=new char[symbol.length()];
  symbol.getChars(0,characters.length,characters,0);
  this.next=next;
}

public Entry ( String symbol , Entry next ) { this . symbol = symbol . intern ( ) ; characters = new char [ symbol . length ( ) ] ; symbol . getChars ( 0 , characters . length , characters , 0 ) ; this . next = next ; }
constructs a new entry from the specified symbol and next entry reference .
