泛型之元组示例

package test;
import demon.Person;
class Tuple<A, B> {
    public final A first;
    public final B second;

    public Tuple(A a, B b) {
        first = a;
        second = b;
    }

    public String toString() {
        return "(" + first + "," + second + ")";

    }

    public A getFirst() {
        return first;
    }

    public B getSecond() {
        return second;
    }
}
public class Test006 {
    public static void main(String[] args) {
        Tuple<Person, Integer> t = new Tuple<>(new Person("zhangsan"), 12);
        System.out.println(t.getFirst().getName());
        System.out.println(t.getSecond());
    }
}