Question

Object Oriented analysis

Implement a Stack using List by inheritance. The implementation shall be in both UML and Java Code.

Answer 1

import java.util.ArrayList;
import java.util.List;

public class ListStack {

    private List<String> data;

    public ListStack() {
        data = new ArrayList<>();
    }

    public void push(String s) {
        data.add(s);
    }
    
    public String top() {
        return data.get(data.size()-1);
    }
    
    public String pop() {
        return data.remove(data.size()-1);
    }
    
    public int size() {
        return data.size();
    }
    
    public boolean isEmpty() {
        return data.isEmpty();
    }
}