asmhatre
38fbd513c9
Co-Authored-By: Claude Sonnet 5.5 <[email protected]> Claude-Session: https://claude.ai/code/session_017ic4b4X2xx7RrveVQU9R1N
24 lines
799 B
Plaintext
24 lines
799 B
Plaintext
== 1. new ArrayList<>(list) and List.copyOf share the elements ==
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boxes = [Box(100), Box(2)]
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viaCtor = [Box(100), Box(2)]
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viaCopyOf = [Box(100), Box(2)]
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after boxes.add(Box(3)): viaCtor.size() = 2
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== 2. The deep version needs the element copy, so a stream or a loop ==
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boxes = [Box(-1), Box(2), Box(3)]
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deep = [Box(100), Box(2), Box(3)]
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== 3. HashMap copy constructor: new map, same values ==
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mCopy.get("k") = Box(55)
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== 4. 1-D primitive arrays: clone / copyOf are true copies ==
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a = [99, 2, 3], clone = [1, 2, 3], copyOf = [1, 2, 3]
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== 5. 2-D arrays: the rows are shared ==
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grid = [[99, 2], [3, 4]]
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shallow = [[99, 2], [3, 4]]
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deepGrid = [[1, 2], [3, 4]]
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== 6. Object arrays: copyOf copies references, not objects ==
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arrCopy[0] = Box(77), same object: true
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