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 in = new Scanner(System.in);
        // 注意 hasNext 和 hasNextLine 的区别
        while (in.hasNextInt()) { // 注意 while 处理多个 case
            int a = in.nextInt();
            int b = in.nextInt();
            int c = in.nextInt();
            int max = -1;
            int min = -1;

            if(a > b){
                if(a < c){
                    max = c;min = b;
                }else{
                    if(b > c){
                        max = a; min = c;
                    }else{
                        max = a; min = b;
                    }
                }
            }else{
                if(a > c){
                    max = b; min = c;
                }else{
                    if(b > c){
                        max = b; min = a;
                    }else{
                        max = c; min = a;
                    }
                }
                
            }
            System.out.println("The maximum number is : " + max);
            System.out.print("The minimum number is : " + min);

        }
    }
}
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 in = new Scanner(System.in);
        // 注意 hasNext 和 hasNextLine 的区别
        while (in.hasNextInt()) { // 注意 while 处理多个 case
            int a = in.nextInt();
            int b = in.nextInt();
            int c = in.nextInt();
            int max = (a > b ? a : b) > c ? (a > b ? a : b) : c;
            int min = (a < b ? a : b) < c ? (a < b ? a : b) : c;    
            System.out.println("The maximum number is : " + max);
            System.out.print("The minimum number is : " + min);

        }
    }
}

int max = (a > b ? a : b) > c ? (a > b ? a : b) : c;int min = (a < b ? a : b) < c ? (a < b ? a : b) : c;

这种表述更简洁