Why does java have wrapper classes

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Programs Data Science Management Technology. The wrapper class in Java provides the mechanism to convert primitive into object and object into primitive. Since J2SE 5. The automatic conversion of primitive into an object is known as autoboxing and vice-versa unboxing.

Java is an object-oriented programming language, so we need to deal with objects many times like in Collections, Serialization, Synchronization, etc.

Let us see the different scenarios, where we need to use the wrapper classes. The eight classes of the java. The list of eight wrapper classes are given below:. The automatic conversion of primitive data type into its corresponding wrapper class is known as autoboxing, for example, byte to Byte, char to Character, int to Integer, long to Long, float to Float, boolean to Boolean, double to Double, and short to Short.

Since Java 5, we do not need to use the valueOf method of wrapper classes to convert the primitive into objects. The automatic conversion of wrapper type into its corresponding primitive type is known as unboxing. It is the reverse process of autoboxing. Since Java 5, we do not need to use the intValue method of wrapper classes to convert the wrapper type into primitives.

Java Wrapper classes wrap the primitive data types, that is why it is known as wrapper classes. We can also create a class which wraps a primitive data type.

So, we can create a custom wrapper class in Java. JavaTpoint offers too many high quality services. Mail us on [email protected] , to get more information about given services. Please mail your requirement at [email protected] Duration: 1 week to 2 week. Java Training Basics of Java. Abstract class Interface Abstract vs Interface. See your article appearing on the GeeksforGeeks main page and help other Geeks.

Please write comments if you find anything incorrect, or you want to share more information about the topic discussed above. Skip to content. Change Language. Related Articles. Basics of Java. Operators in Java. Packages in Java. Flow Control in Java. Loops in Java. Jump Statements in Java.

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