Stack in Java interleaving values [closed]

I have two stacks I have to create the third one interleaving the values of the two stacks I created the stack and all I'm having a lock to implement is the code to interleave

follow the code:

public class Pilha {
    private Stack p;

    public Pilha()
    {
       p = new Stack();
    }

    public void insere(int x)
    {
        p.push(x);
    }

    public int remove()
    {
        return (int) p.pop();
        }
}

public static void main(String[] args) {
    // TODO code application logic here

    int a=2, b=3, c=4, d=5,e=6,f=7,g=8,h=9;
    Pilha p1 = new Pilha();
    Pilha p2 = new Pilha();
    Pilha p3 = new Pilha();
    p1.insere(a);
    p1.insere(b);
    p1.insere(c);
    p1.insere(d);
    p2.insere(e);
    p2.insere(f);
    p2.insere(g);
    p2.insere(h);