Identity vs state, live

1. static boolean smallBoxedIdentity() — Integer a = 100, b = 100; return a == b; 2. static boolean largeBoxedIdentity() — Integer a = 500, b = 500; return a == b; 3. static boolean largeBoxedEquals() — same values, a.equals(b). 4. static int sameIdentityTwice() — build one List<String>, call System.identityHashCode on it twice, return how many DISTINCT hash values you saw (one — identity is stable).