TreeMap t=new TreeMap();
Scanner sc=new Scanner(System.in);
t.put(1,"hao");
String i=sc.next();
t.get(Integer.parseInt(i))和
t.get(String.valueOf(i)))都能获取到对应的键值吗?
TreeMap t=new TreeMap();
Scanner sc=new Scanner(System.in);
t.put(1,"hao");
String i=sc.next();
t.get(Integer.parseInt(i))和
t.get(String.valueOf(i)))都能获取到对应的键值吗?
TreeMap中存放了类型,如果用key为String类型去取值,会报错,所以t.get(String.valueOf(i)))取不到值