java - 打印具有多个值的键的 HashMap

Question

class hello {
    string name;
    int number;
}

class object {
    public static void main(string args[]) {
        HashMap hs = new HashMap();
        hello c1 = new hello();
        hello c2 = new hello();
        hs.put("india",c1);
        hs.put("america",c2);
    }
}

如何打印键值对

具有多个值的键如何打印

Answer 1

像这样迭代Map或HashMap。

Map<String, Hello> map=new HashMap<>();
Set<Entry<String, Hello>> entries=map.entrySet();
for (Entry<String, Hello> entry : entries) {
    String key=entry.getKey();
    Hello hello=entry.getValue();
}