Java Wrapper Classes - Integer Double Character - Converting String to double - APPFICIAL

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Java provides wrapper classes for all the primitive data types, in order to provide some useful methods that involve primitive data. These include: Character, Integer, Double, Boolean, and Long. One common method is the parse method for converting a String to an int or double. For example, this will convert the string literal "3.14" to a double.

A primitive wrapper object, and also String objects, are immutable, meaning that the methods cannot change the object’s data

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