import java.util.Iterator;
import java.util.Spliterator;
import java.util.function.Consumer;

public class Kontener01 implements Iterable{
    private Object tab[];
    Kontener01(int size){ tab=new Object[size]; }
    public Object get(int index){
        if (index>=tab.length || index<0)
        {
            throw new ArrayIndexOutOfBoundsException("index = "+ index);
        }
        else
            {
                return tab[index];
            }
    }
    public void set(int index, Object value)
    {
        if(index<0)
        { throw new
            ArrayIndexOutOfBoundsException("index = "+index);
        }
        if (index>=tab.length)
        {
            resize(index+1);
        }
        tab[index]=value;
    }
    protected void resize(int size){
        Object newTab[]=new Object[size];
        for(int i=0; i<tab.length;i++){ newTab[i]=tab[i];}
        tab=newTab; }
    public int size(){return tab.length; }


    public static void main(String[] args) {
        Kontener01 tab=new Kontener01(2);
        tab.set(0,"Zamek");
        tab.set(1,2);
        tab.set(2,3.324); //metoda set potrafi „zwiekszac” rozmiar tablicy
        for(int i=0; i<tab.size(); i++)
        {
           System.out.println("tab["+i+"] = "+tab.get(i)+" ");
        }

        for(Object o:tab){ System.out.println(o); }
    }

    @Override
    public Iterator iterator() {
        return new Iterator() {
            int position = 0;
            @Override
            public boolean hasNext() {
                return position<tab.length;
            }

            @Override
            public Object next() {
                return tab[position++];
            }
            @Override
            public void remove()
            {
                throw new UnsupportedOperationException();
            }
        };
    }

}