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java-core-examples/copying/output/07-defensive.txt
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== 1. Leak through the constructor ==
leaky.size() after the caller clears its own list : 0
== 2. Leak through the getter ==
leaky2.getNames() = [asha, ravi, intruder]
== 3. The defensive version ==
safe.size() after the caller clears its list : 2
safe.getNames().add(...) -> UnsupportedOperationException
== 4. unmodifiableList is a VIEW; List.copyOf is a SNAPSHOT ==
source = [a, b, c]
view = [a, b, c]
snapshot = [a, b]
== 5. copyOf is shallow: the ELEMENTS are still shared ==
frozen.get(0) = x-mutated