点击运行
import java.util.HashMap; public class Main { public static void main(String[] args) { HashMap
sites = new HashMap<>(); sites.put(1, "Google"); sites.put(2, "Jiyik"); sites.put(3, "Taobao"); System.out.println("HashMap: " + sites); // 删除key为2的映射关系 String siteName = sites.remove(2); // return Jiyik System.out.println("返回值: " + siteName); System.out.println("删除后的 HashMap: " + sites); } }
运行结果 :
正在执行...