field is
static Printer getInstance()
call round: 0 / 3
shared static field
instance = null
🏭 instances created0
🔒 lock acquisitions0
🔑 lockfree
Two threads, one instant
Press ▶ Both call getInstance() — T1 and T2 call it at the same moment.
▸
Run each mode once. The scoreboard fills in and the winner becomes obvious: one instance, zero locks, still lazy.