import java.lang.Byte;

public class ByteTest
{
    public static char bitStringToChar(String s) {
        // s is a binary string of 8 bits
        char c = 0;
        char p = 1;
        for (int i = 0; i < 8; i++) {
            if (s.charAt(7-i) == '1')
                c += p;
            p *= 2;                
        }
        return c;
    }
    
    public static String charToBitString(char c) {
        String s = "";
        for (int i = 0; i < 8; i++) {
            if (c % 2 == 1)
                s = s + "1";
            else
                s = s + "0";
                
            c = (char) (c / 2);        
        }
        return s;
    }

	public static void main(String[] args)
	{
		char t = bitStringToChar("11111111");
		System.out.println((int) t);
		System.out.println(charToBitString(t));
	}
}