What is the difference between inner class and nested class?

inner classes are in the same file, whereas subclasses can be in another file, maybe in another package . You cannot get an instance of an inner class without an instance of the class that contains it. inner classes have the methods they want, whereas subclasses have the methods of their parent class.

A Wrapper class is a class whose object wraps or contains primitive data types . When we create an object to 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.6 Ağu 2020

The wrapper class in Java provides the mechanism to convert primitive into object and object into primitive. … Use of Wrapper classes in Java. Primitive TypeWrapper classintIntegerlongLongfloatFloatdoubleDoubleWrapper class in Java – Javatpoint www.javatpoint.com › wrapper-class-in-java

The key difference between wrapper class and primitive type in Java is that wrapper class is used to convert a primitive type to an object and object back to primitive type while a primitive type is a predefined data type provided by the Java programming language .

Use of Wrapper Class in Java Programming The wrapper class implements the technique to convert the primitive into object and object into primitive . There is a concept of autoboxing and unboxing in the wrapper class, which transform the primitives into objects and objects into primitives automatically.