/* package whatever; // don't place package name! */

import java.util.*;
import java.lang.*;
import java.io.*;

/* Name of the class has to be "Main" only if the class is public. */
class Ideone
{
	public static void main (String[] args) throws java.lang.Exception
	{
                final int RADIX = 10;
                int i = 4;
                char ch = Character.forDigit(i, RADIX);
                System.out.println(ch); // Prints '4'
                
                int i2 = Character.digit(ch, RADIX);
                System.out.println(i2); // Prints '4'
	}
}