Add java21-features module: runnable demos and captured output for the ankurm.com java21-features article

2026-10-20 17:13:59 +00:00
parent 5a076c826f
commit c3cc57f482
33 changed files with 354 additions and 0 deletions
@@ -0,0 +1,11 @@
+$ javac  src/SequencedCollectionsDemo.java && java  SequencedCollectionsDemo     (21.0.12.1)
+getFirst/getLast: a c
+reversed view   : [c, b, a]
+addFirst+removeLast: [z, a, b]
+LinkedHashSet reversed: [3, 2, 1]
+firstEntry/lastEntry : x=1 z=3
+putFirst        : {w=0, x=1, y=2, z=3}
+reversed map    : {z=3, y=2, x=1, w=0}
+view sees add   : [3, 2, 1]
+immutable list : UnsupportedOperationException
+HashSet         : no getFirst (unordered)