public class LazySingleton {  
    private int someField;  
      
    private static LazySingleton instance;  
      
    private LazySingleton() {  
        this.someField = new Random().nextInt(200)+1;         // (1)  
    }  
      
    public static LazySingleton getInstance() {  
        if (instance == null) {                               // (2)  
            synchronized(LazySingleton.class) {               // (3)  
                if (instance == null) {                       // (4)  
                    instance = new LazySingleton();           // (5)  
                }  
            }  
        }  
        return instance;                                      // (6)  
    }  
      
    public int getSomeField() {  
        return this.someField;                                // (7)  
    }  
}