<P> Primitive wrapper classes are used to create an Object that needs to represent primitive types in Collection classes (i.e., in the Java API), in the java. util package and in the java. lang. reflect reflection package . Collection classes are Java API - defined classes that can store objects in a manner similar to how data structures like arrays store primitive data types like int, double, long or char, etc., but arrays store primitive data types while collections actually store objects . </P> <P> The primitive wrapper classes and their corresponding primitive types are: </P> <Dl> <Dd> <Table> <Tr> <Th> Primitive type </Th> <Th> Wrapper class </Th> <Th> Constructor arguments </Th> </Tr> <Tr> <Td> byte </Td> <Td> Byte </Td> <Td> byte or String </Td> </Tr> <Tr> <Td> short </Td> <Td> Short </Td> <Td> short or String </Td> </Tr> <Tr> <Td> int </Td> <Td> Integer </Td> <Td> int or String </Td> </Tr> <Tr> <Td> long </Td> <Td> Long </Td> <Td> long or String </Td> </Tr> <Tr> <Td> float </Td> <Td> Float </Td> <Td> float, double or String </Td> </Tr> <Tr> <Td> double </Td> <Td> Double </Td> <Td> double or String </Td> </Tr> <Tr> <Td> char </Td> <Td> Character </Td> <Td> char </Td> </Tr> <Tr> <Td> boolean </Td> <Td> Boolean </Td> <Td> boolean or String </Td> </Tr> </Table> </Dd> </Dl> <Dd> <Table> <Tr> <Th> Primitive type </Th> <Th> Wrapper class </Th> <Th> Constructor arguments </Th> </Tr> <Tr> <Td> byte </Td> <Td> Byte </Td> <Td> byte or String </Td> </Tr> <Tr> <Td> short </Td> <Td> Short </Td> <Td> short or String </Td> </Tr> <Tr> <Td> int </Td> <Td> Integer </Td> <Td> int or String </Td> </Tr> <Tr> <Td> long </Td> <Td> Long </Td> <Td> long or String </Td> </Tr> <Tr> <Td> float </Td> <Td> Float </Td> <Td> float, double or String </Td> </Tr> <Tr> <Td> double </Td> <Td> Double </Td> <Td> double or String </Td> </Tr> <Tr> <Td> char </Td> <Td> Character </Td> <Td> char </Td> </Tr> <Tr> <Td> boolean </Td> <Td> Boolean </Td> <Td> boolean or String </Td> </Tr> </Table> </Dd>

Type wrapper class for primitive types in java
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