=== Q44 Lambdas and functional interfaces ===
180.0 true 6 hello 5
=== Q45 Streams: map, filter, collect, laziness ===
[ASHA, ARJUN]
{4=2, 5=2}
nothing visited yet: no terminal operation
visited asha
first = asha
reuse -> stream has already been operated upon or closed
=== Q46 Optional ===
expensive() called
orElse    : value
orElseGet : value
nothing here
=== Q47 Records ===
Point[x=1, y=2] equals Point[x=1, y=2]: true, x() = 1
rejected: negative coordinate
=== Q48 var, switch expressions and text blocks ===
{"name": "asha",
 "grade": "A"}
=== Q49 Method references and default methods ===
abc
walk and swim
=== Q50 Threads: start() vs run(), and virtual threads ===
running on: main
running on: worker-1
virtual: true