java Programming Glossary: singletonholder

http://stackoverflow.com/questions/1050991/singleton-with-arguments-in-java

instantiation from other classes private Singleton SingletonHolder is loaded on the first execution of Singleton.getInstance or.. execution of Singleton.getInstance or the first access to SingletonHolder.INSTANCE not before. private static class SingletonHolder private.. SingletonHolder.INSTANCE not before. private static class SingletonHolder private static final Singleton INSTANCE new Singleton public..

Implementing the singleton pattern in Java

http://stackoverflow.com/questions/2008912/implementing-the-singleton-pattern-in-java

class Singleton public static Singleton getInstance return SingletonHolder.instance private Singleton private static final class SingletonHolder.. private Singleton private static final class SingletonHolder static final Singleton instance new Singleton The JLS guarantees.. DCL pattern thread safe but it makes it slower than the SingletonHolder class method while the original intent was performance optimization..

mocking a singleton class

http://stackoverflow.com/questions/2302179/mocking-a-singleton-class

class Singleton private Singleton private static class SingletonHolder private static final Singleton INSTANCE new Singleton public.. new Singleton public static Singleton getInstance return SingletonHolder.INSTANCE public String getFoo return bar There are two testing..

Singleton instantiation

http://stackoverflow.com/questions/7121213/singleton-instantiation

class Singleton private Singleton ... private static class SingletonHolder private static final Singleton instance new Singleton public.. new Singleton public static Singleton getInstance return SingletonHolder.instance In the code above the singleton will only be instantiated.. the singleton will only be instantiated when the class SingletonHolder is initialized. This will happen only once unless as I said..