Java program to convert lowercase character to uppercase

Write a Java program which accept a lowercase character from user and convert in uppercase without using library function.

import java.util.Scanner;
public class LowerToUpperASCII 
{
    public static void main(String args[]) 
	{
        Scanner sc = new Scanner(System.in);
        System.out.print("Enter a lowercase letter: ");
        char lowercaseChar = sc.next().charAt(0);
		int code=(int)lowercaseChar;
        // ASCII value difference between lowercase and uppercase letters is 32
        char uppercaseChar = (char) (code - 32);
        System.out.println("Uppercase equivalent: " + uppercaseChar);
    }
}