Java Stack ile Örnek Çalışmalar

public class Stackb {
    public Node top = null;
    public int size = 0;
    
    public **** push(Node newNode){
        newNode.link = top;
        top = newNode;
        size++;
    }
    public Node pop(){
        Node temp = null;
        if(top == null){
            System.out.println("Yığıt Boş");
        }
        else{
            temp = top;
            top = top.link;
        }
        size--;
        return temp;
    }
    public Node peek(){
        if(top == null){
            System.out.println("Yığıt Boş");
            return top;
        }
        else
            return top;
    }
}

public class Node {
    public Node link;
    String ad,soyad;
    int no;
    
    public Node(){
        this(0,null,null);
    }
    public Node(int no,String ad,String soyad){
        this.no = no;
        this.ad = ad;
        this.soyad = soyad;
    }
}


public class FinalExamEx {
    public static **** main(String[] args) {
        int dizi[] = {-25,10,12,-4,-9,88,54,-35,65,-8,-7,45,59,-2,74};
        Stackb stc = new Stackb();
        for (int i = 0; i < dizi.length; i++) {
            if(dizi[i] < 0){
                stc.push(new Node(dizi[i], null, null));
            }
            else
                continue;
        }
    }
    
}