整数转换

/*
 * Problem: Determine the number of bits needed to convert integer A to integer B.
 * Approach: Use Java Streams to count the number of differing bits.
 * XOR A and B, convert to binary string, and count '1's.
 */

import java.util.stream.Stream;

public class BitConversionStream {
    public static int countBitsToConvert(int A, int B) {
        return (int) Stream.of(Integer.toBinaryString(A ^ B).split(""))
                .filter(bit -> bit.equals("1"))
                .count(); // Count the number of '1's in the binary string
    }

    public static void main(String[] args) {
        System.out.println(countBitsToConvert(29, 15)); // Output: 2
        System.out.println(countBitsToConvert(1, 2)); // Output: 2
    }
}