Java 21: SequencedMap first/last entries

LinkedHashMap now exposes firstEntry, lastEntry and reversed views.

Code

LinkedHashMap<String, Integer> m = new LinkedHashMap<>();
m.put("a", 1); m.put("b", 2); m.put("c", 3);
System.out.println(m.firstEntry());
System.out.println(m.lastEntry());

Output

a=1
c=3

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Published 2026-07-26