二进制字符串中第一位的更改值 - Java

public class BinaryString {
    public static void main(String[] args) {
        String binaryString = "101010";
        String updatedBinaryString = updateFirstBit(binaryString);
        System.out.println("Original binary string: " + binaryString);
        System.out.println("Updated binary string: " + updatedBinaryString);
    }

    public static String updateFirstBit(String binaryString) {
        if (binaryString == null || binaryString.length() == 0) {
            return binaryString;
        }
        char firstChar = binaryString.charAt(0);
        char updatedChar;
        if (firstChar == '0') {
            updatedChar = '1';
        } else {
            updatedChar = '0';
        }
        return updatedChar + binaryString.substring(1);
    }
}