Chapter 9, Problem 3SA

Explanation of Solution

Wrapper class:

• As the name suggests, it is a class that “wraps around” a primitive data type and allows the user to create objects instead of variables.
• Static “toString ()” methods:
  • Every numeric wrapper class has this method that converts the value to a string.
  • This method contains a value as the argument and returns a string.

Example program:

//Declare the main class

public class Sample

{

//Declare the main method

public static void main(String args[])

{

//Declare required variables

int i = 10;

double d = 20...