Java N-Tuple implementation

Question

I just made a Java n-tuple which is type-safe.
I\'m using some unconventional methods to achieve type-safety (I just made it for fun).

Can someone can give some

Answer 1

This is the simplest solution and it's also the best. It's similar to how Tuples are represented in .NET. It carefully sidesteps java erasure. It is strongly typed. It does not throw exceptions. It is very easy to use.

public interface Tuple
{
    int size();
}

public class Tuple2 implements Tuple
{
    public final T1 item1;
    public final T2 item2;

    public Tuple2(
        final T1 item_1,
        final T2 item_2)
    {
        item1 = item_1;
        item2 = item_2;
    }

    @Override
    public int size()
    {
        return 2;
    }
}

public class Tuple3 implements Tuple
{
    public final T1 item1;
    public final T2 item2;
    public final T3 item3;

    public Tuple3(
        final T1 item_1,
        final T2 item_2,
        final T3 item_3)
    {
        item1 = item_1;
        item2 = item_2;
        item3 = item_3;
    }

    @Override
    public int size()
    {
        return 3;
    }
}