java program to implement stack with linked-list

package stack_withLL;

class node{
    protected int data;
    protected node link;

    public node(){
        data = 0;
        link = null;
    }

    public node(int v, node n){
        data = v;
        link = n;
    }
    /*  Function to get link to next node  */
    public node getLink()
    {
        return link;
    }
    /*  Function to get data from current Node  */
    public int getData()
    {
        return data;
    }

}

public class linked_stack {
    protected node top;
    protected int size;

}