Podsumowanie wzorców projektowych GoF

public class DvdTitleExpression extends DvdAbstractExpression {public String interpret(DvdInterpreterContextdvdInterpreterContext) {ArrayList titles = dvdInterpreterContext.getAllTitles();ListIterator titlesIterator = titles.listIterator();StringBuffer titleBuffer = new StringBuffer("");boolean first = true;while (titlesIterator.hasNext()) {if (!first) {titleBuffer.append(", ");} else {first = false;}titleBuffer.append((String)titlesIterator.next());}return titleBuffer.toString();}}Wyjcie na konsoli:interpreting show actor: Query Result: Ethan Hawke, Denzel Washingtoninterpreting show actor for title : Query Result: Ethan Hawke, Denzel Washingtoninterpreting show title: Query Result: Caddy Shack, Training Day, Hamletinterpreting show title for actor : Query Result: Hamlet, Training Day, Caddy Shack88