Classy Puzzlers - Java Puzzlers: Traps, Pitfalls, and Corner Cases - page 152

}
}
This solution uses an alternate constructor invocation [JLS 8.8.7.1]. This feature allows one
constructor in a class to chain to another constructor in the same class. In this case, MyThing()
chains to the private constructor MyThing(int) , which performs the required instance initialization.
Within the private constructor, the value of the expression SomeOtherClass.func() has been
captured in the parameter i and can be stored in the final field param after the superclass
constructor returns.
The Private Constructor Capture idiom illustrated by the solution to this puzzle is a useful pattern
to add to your bag of tricks. We've seen some genuinely ugly code that could have been avoided
with this pattern.
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