Design Patterns Java™ Workbook

Decorator (Chapter 27)

SOLUTION 27.1

One answer is: Writer out = new PrintWriter(System.out); out = new WrapFilter(new BufferedWriter(out), 15); ((WrapFilter) out).setCenter(true); out = new RandomCaseFilter(out); Alternatively: WrapFilter out = new WrapFilter( new BufferedWriter( new RandomCaseFilter( new PrintWriter(System.out))), 15); out.setCenter(true); The com.oozinoz.applications package includes classes ShowFilters2 and ShowFilters3, which apply these two methods, respectively: package com.oozinoz.applications; import java.io.*; import com.oozinoz.io.*; public class ShowFilters3 { public static void main(String args[]) throws IOException { BufferedReader in = new BufferedReader(new FileReader(args[0])); WrapFilter out = new WrapFilter( ...