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Initialization of the {{Holder}} class is deferred until the {{getInstance()}} method is called, following which the {{helper}} field is initialized. The only limitation of this method is that it works only for {{static}} fields and not instance fields \[[Bloch 01|AA. Java References#Bloch 01]\]. This idiom is a better choice than the double checked locking idiom for lazily initializing {{static}} fields \[[Bloch 08|AA. Java References#Bloch 08]\]. |
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