TaskAppJava

import javax.swing.*;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.*;
import java.util.List;

public class Frame extends JFrame implements ActionListener
{
    JFrame window;
    JButton addTask;
    JTextField taskName;
    JPanel taskAddPanel, taskDisplayPanel;
    DefaultListModel<Task> activeTasks;
    JList<Task> activeTaskDisplay;
    JScrollPane scrollPane;
    Frame()
    {
        window = new JFrame("To Do app");
        window.setLayout(new BorderLayout());
        activeTasks = new DefaultListModel<>();
        addTask = new JButton("Add Task");
        taskName = new JTextField(10);
        taskAddPanel = new JPanel();
        taskDisplayPanel = new JPanel();
        activeTaskDisplay = new JList<Task>();
        scrollPane = new JScrollPane();

        activeTaskDisplay.setVisible(true);
        taskAddPanel.add(taskName);
        taskAddPanel.add(addTask);

        scrollPane.setViewportView(activeTaskDisplay);
        activeTaskDisplay.setLayoutOrientation(JList.VERTICAL);

        taskDisplayPanel.add(scrollPane);


        addTask.addActionListener(this);

        window.add(taskAddPanel, BorderLayout.NORTH);
        window.add(taskDisplayPanel, BorderLayout.CENTER);
        window.setMinimumSize(new Dimension(800,600));
        window.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        window.setVisible(true);
    }

    @Override
    public void actionPerformed(ActionEvent e)
    {
        if(e.getSource() == addTask)
        {
            if(taskName.getText() != null && !taskName.getText().isEmpty())
            {
                activeTaskDisplay.setModel(activeTasks);
                activeTasks.addElement(new Task(taskName.getText()));
                System.out.println("dupa");
            }
        }
    }
}




//TASK CLASS

public class Task
{
    String name;
    private boolean isFinished;
    Task(String name)
    {
        this.name = name;
        isFinished = false;
    }
    boolean isFinished()
    {
        return isFinished;
    }
    void finish()
    {
        isFinished = true;
    }
}