Question: What design pattern would you say the following Java class is based on? public class PrintSpooler { private static PrintSpooler spooler; private PrintSpooler() { }

What design pattern would you say the following Java class is based on? public class PrintSpooler { private static PrintSpooler spooler; private PrintSpooler() { } public static synchronized PrintSpooler getSpooler() { if (spooler == null) spooler = new PrintSpooler(); return spooler; } public void print(String s) { System.out.println(s); } }

Flyweight, Bridge ,Prototype, Facade, Composite ,Singleton

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