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import java.util.HashMap; public class Main { public static void main(String[] args) { HashMap<Integer, String> 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 Boolean flag1 = sites.remove(1, "Google"); // return true Boolean flag2 = sites.remove(2, "Weibo"); // return false System.out.println("返回值 flag1: " + flag1); System.out.println("返回值 flag2: " + flag2); System.out.println("删除后的 HashMap: " + sites); } }
运行结果 :
正在执行...
