29 lines
932 B
Plaintext
29 lines
932 B
Plaintext
=== List (ArrayList implements SequencedCollection) ===
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getFirst() = alpha
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getLast() = gamma
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after addLast("delta"): [alpha, beta, gamma, delta]
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reversed() = [delta, gamma, beta, alpha]
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=== Deque (ArrayDeque implements SequencedCollection) ===
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getFirst() = 1
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getLast() = 3
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reversed() = [3, 2, 1]
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=== LinkedHashSet implements SequencedSet (insertion order preserved) ===
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getFirst() = red
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getLast() = blue
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reversed() = [blue, green, red]
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=== LinkedHashMap implements SequencedMap (insertion order) ===
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firstEntry() = jan=1
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lastEntry() = mar=3
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after putFirst("dec", 12): {dec=12, jan=1, feb=2, mar=3}
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sequencedKeySet() = [dec, jan, feb, mar]
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reversed() = {mar=3, feb=2, jan=1, dec=12}
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=== TreeMap implements SequencedMap too (order = comparator order, not insertion) ===
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tree contents (natural order) = {1=one, 2=two, 3=three}
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firstEntry() = 1=one
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lastEntry() = 3=three
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reversed() = {3=three, 2=two, 1=one}
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