Apr 15, 2025 · A Wrapper class in Java is one whose object wraps or contains primitive data types. When we create an object in a wrapper class, it contains a field, and in this field, we can store primitive data types. In other words, we can wrap a primitive value into a wrapper class object. Let’s check on the wrapper classes in Java with examples.

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: Sometimes you must use wrapper classes, for example when working with Collection objects, such as ArrayList, where primitive types cannot be used (the list can only store objects):

Mar 17, 2024 · Have a look at wrapper classes in Java and how boxing and unboxing primitives works.

Java Wrapper Classes. Wrapper classes are those whose objects wraps a primitive data type within them. In the java.lang package java provides a separate class for each of the primitive data types namely Byte, Character, Double, Integer, Float, Long, Short.

Feb 3, 2025 · Java platform provides the list of eight wrapper classes for each of the primitive types. These wrapper classes are defined in java.lang package. All the wrapper classes are immutable and final in Java whose objects each hold a single primitive value.

This guide, explained about Wrapper classes API guide with examples.

In this tutorial we will discuss details of wrapper classes like what wrapper classes is, list of wrapper classes, conversion from primitive to wrapper type and vice-versa, AutoBoxing and Unboxing, java program of primitive to wrapper conversion, why do we use wrapper classes etc.

Learn about Java wrapper classes, their usage, conversion between primitives and objects; and autoboxing and unboxing with examples. 1. Java Wrapper Classes. In Java, we have 8 primitive data types. Java provides type wrappers, which are classes that encapsulate a primitive type within an Object.

Aug 19, 2022 · Each of eight primitive of java data types has a class dedicated to it, are known as wrapper classes, because they wrap the primitive data type into an object of that class. The wrapper classes are part of the java.lang package, which …

Nov 30, 2024 · There are eight wrapper classes in Java, one for each primitive type: int — Integer, char — Character, byte — Byte, and so on. The following table lists all primitive types and the corresponding wrapper classes.