import java.util.Scanner; // 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 sc = new Scanner(System.in); while (sc.hasNext()){ String str = sc.nextLine(); int i = Integer.parseInt(str.substring(2,str.length()), 16); System.out.println(i); } } ...