Web Reference: The Integer class wraps a value of the primitive type int in an object. An object of type Integer contains a single field whose type is int. Wrapper classes provide a way to use primitive data types (int, boolean, etc..) as objects. The table below shows the primitive type and the equivalent wrapper class: Jan 25, 2026 · Each wrapper class encapsulates a corresponding primitive value inside an object (e.g., Integer for int, Double for double). Java provides wrapper classes for all eight primitive data types to support object-based operations.
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