ExempleCh04_02_DPSingletonCAS1RetourTélécharger Exemple du DP Singleton ExempleCh04_02.java // Exemple du DP Singleton import java.util.*; import java.io.*; // Programme principal du test du factory // public class ExempleCh04_02 { public static void main(String[] args) { Log.getInstance().logguer("toto"); Log.getInstance().logguer("tata"); Bidon bidon= new Bidon(); bidon.call(); } } class Log { private static Log singleton = new Log(); private String fichierLog; private int numero; private PrintStream pos; private Log() { fichierLog = "../log.txt"; numero=0; try{pos = new PrintStream(new FileOutputStream(new File(fichierLog)));}catch(Exception ex){} } public static Log getInstance() { return singleton; } public void logguer(String chaine){ pos.println(numero+":"+chaine); pos.flush(); numero++; } } class Bidon{ public void call(){ Log.getInstance().logguer("call de Bidon"); } } compil.bat mkdir bin del /f /s /q bin\*.class javac -d bin *.java pause log.txt 0:toto 1:tata 2:call de Bidon run.bat cd bin java ExempleCh04_02 pause