Singleton

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java

There are two classes that are declared in the file. That will be displayed after the launch? Test.java: class Singleton { private static Singleton s = new Singleton(); protected Singleton() { System.out.println("S"); } public static Singleton getInstance() { return s; } } public class Test { public void method() { Singleton.getInstance(); } public static void main(String [] str) { new Test(); } }

java

Which statements about the following code are correct ? (in some application): public class Singleton { private static Singleton singleton; public static Singleton getInstance() { if (singleton == null) { singleton = new Singleton(); } return singleton; } }