import java.util.BitSet;

public class HelloWorld {
	public static void main(String[] args) {
		String s = "hello@^@$05oiejfcq3941[u204";
		System.out.println(s);
		BitSet a = stringToBitSet(s);
		System.out.println(a);
		s = bitSetToString(a);
		System.out.println(s);
	}

	static String bitSetToString(BitSet a) {
		int length = (a.length() + Character.SIZE - 1)
				/ Character.SIZE;
		char[] result = new char[length];
		for (int i = 0; i < length; i++) {
			BitSet character =
					a.get(Character.SIZE * i,
					Character.SIZE * (i + 1));
			result[i] = (char)
					character.toLongArray()[0];
		}
		return new String(result);
	}

	private static BitSet stringToBitSet(String s) {
		BitSet a = new BitSet();
		for (int i = 0; i < s.length(); i++) {
			char c = s.charAt(i);
			for (int j = 0; j < Character.SIZE; j++) {
				boolean bit = ((c >> j) & 1) > 0;
				a.set(Character.SIZE * i + j, bit);
			}
		}
		return a;
	}
}