example.java

import java.util.Iterator;
import java.util.Random;

// example 1
// using java.util.Iterator
class InfiniteSequence1 implements Iterator<Integer>
{
    public InfiniteSequence1(Random rng)
    {
        this.rng= rng;
    }

    @Override
    public Integer next()
    {
        return this.rng.nextInt();
    }

    @Override
    public boolean hasNext()
    {
        return true;
    }

    @Override
    public void remove()
    {
        throw new UnsupportedOperationException();
    }

    private final Random rng;
}

// example 2
// using own type
interface InfiniteSequence<T>
{
    T next();
}

class InfiniteSequence2 implements InfiniteSequence<Integer>
{
    public InfiniteSequence2(Random rng)
    {
        this.rng= rng;
    }

    @Override
    public Integer next()
    {
        return this.rng.nextInt();
    }

    private final Random rng;
}