题解 | 查找学生信息

import java.util.HashMap;
import java.util.Map;
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 scanner = new Scanner(System.in);
        Map<String,String> map = new HashMap<>();
        while (scanner.hasNextInt()) {
            int N = scanner.nextInt();
            while(N-- > 0){
                // 也可以用自定义的类存储属性
                String id = scanner.next();
                String name = scanner.next();
                String sex = scanner.next();
                String age = scanner.next();
                map.put(id,name+" "+sex+" "+age);
            }

            int M = scanner.nextInt();
            while(M-- > 0){
                String id = scanner.next();
                if(map.containsKey(id)){
                    System.out.println(id +" "+  map.get(id));
                }else{
                    System.out.println("No Answer!");
                }
                // String result = map.getOrDefault(id,"No Answer!");
            
            }

        }
    }
}