题解 | #求最大连续bit数#

import java.util.Objects;
import java.util.Scanner;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

// 注意类名必须为 Main, 不要有任何 package xxx 信息
public class Main {
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        while (in.hasNextLine()) {
            String nextLine = in.nextLine();
            if (Objects.isNull(nextLine) || nextLine.equals("")) {
                break;
            }
            int n = Integer.parseInt(nextLine);
            String string = Integer.toBinaryString(n);
            int max = 0;
            String regex = "[1]+";
            Pattern compile = Pattern.compile(regex);
            Matcher matcher = compile.matcher(string);
            while (matcher.find()) {
                int length = matcher.group()
                    .length();
                max = Math.max(length, max);
            }
            System.out.println(max);
        }
    }
}