Wrapper Classes in Java

Wrapper Classes in Java — a practical guide to Java wrapper classes with clear examples you can reuse in real projects.

Java Tutorial Series (59/90). Prefer one article? Read the complete Java tutorial.

Short description

Autoboxing converts between primitives and wrappers automatically.

Autoboxing

Integer x = 10; // autobox
int y = x;      // unbox
List<Integer> nums = List.of(1, 2, 3);