Summary of Class wrapper knowledge points for Java basic types

(1) The double class and the float class implement the class wrapper of the double and float basic data. Use the construction method of the double class double (double num) to create a double type of data, and the double object calls the Doublevalue () method to return the type of double data that the object contains. The use of the Float, Byte, Integer, short, and long classes is similar.

(2) The character class implements the class wrapper for the Char basic type data. You can use the constructor method of the character class character (char c) to create an object of type character. Character calls the Charva () method to return the char-type data that the object contains.

Summary of Class wrapper knowledge points for Java basic types