Java泛型读书笔记 (二)

关于Java泛型擦除后，继承一个泛型类带来的问题

有如下泛型类Pair:

public class Pair<T>
{
    private T second;
    private T first;

    public Pair()
    {
        first = null;
        second = null;
    }

    public Pair(T first, T second)
    {
        this.first = first;
        this.second =second;
    }

    public T getFirst()
    {
        return first;
    }

    public T getSecond()
    {
        return second;
    }

    public void setFirst(T newValue)
    {
        first = newValue;
    }

    public void setSecond(T newValue)
    {
        second = newValue;
    }
}
public