题解 | #map简单应用#
map简单应用
https://www.nowcoder.com/practice/7a47e465315c40848d5daba676f9ac29
import java.util.*; public class Main { public static void main(String[] args) { Scanner scanner = new Scanner(System.in); String name = scanner.next(); Map<Integer, String> map = new HashMap<Integer, String>(); map.put(1, "Amy"); map.put(2, "Joe"); map.put(3, "Tom"); map.put(4, "Susan"); //write your code here...... map.forEach((k,v) -> System.out.println(k+":"+v)); map.put(5,name); map.remove(4); map.replace(3,"Tommy"); System.out.println(); map.forEach((k,v) -> System.out.println(k+":"+v)); } }