java 设置多个泛型类型

 class NotePad<K,V>{
    private K key;
    private V value;
    public K getKey() {
        return key;
    }
    public void setKey(K key) {
        this.key = key;
    }
    public V getValue() {
        return value;
    }
    public void setValue(V value) {
        this.value = value;
    }

    
}

public class dsadas {
    public static void main(String args[]){
        Notepad<String,Integer> t=new Notepad<String ,Integer>();
        t.setKey("李兴华");
        t.setValue(30);
        System.out.println("Name:"+t.getKey());
        System.out.println("Age:"+t.getValue());
    }
}