How do you use bit strings in java programming?

given subsets A and B of a set with n elements, use bit strings to find A, A U B, A - B, and A + BHow do you use bit strings in java programming?
//Collection.addAll() - union


//Collection.retainAll() - intersection





//add bits to a collection object





String binStr = new Integer(8).toBinaryString;


char[] bits = binStr.toCharArray();





Collection c = new ArrayList();


for(int i = 0; i %26lt; bits.length; i++)


{c.add(new Character(bits[i]));}





/*


make two collection with different elements as shown above then invoke the two aforementioned methods on them.


*/