ToDoListGUI.java

import java.awt.BorderLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.DefaultListModel;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JList;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTextField;

public class ToDoListGUI {
    private JFrame frame;
    private JButton addButton;
    private JPanel mainPanel;
    private JPanel buttonPanel;
    private JTextField userInput;
    private JLabel label;
    private DefaultListModel<String> taskMemory;
    private JList<String> taskList;
    private JButton removeButton;
    private JButton clearAllTasksButton;
    
 public ToDoListGUI () {
        frame = new JFrame();
        frame.setTitle("To Do List");

        addButton = new JButton("Create new task");
        removeButton = new JButton("Remove selected task");
        clearAllTasksButton = new JButton("Remove all tasks");
        label = new JLabel();


        frame.setSize(500,400);
        mainPanel = new JPanel(new BorderLayout());
        userInput = new JTextField(20);
        JPanel inputPanel = new JPanel();
        inputPanel.add(userInput);
        inputPanel.add(label);

        taskMemory = new DefaultListModel<>();
        taskList = new JList<>(taskMemory);

        JScrollPane scrollPane = new JScrollPane(taskList);
        scrollPane.setPreferredSize(new java.awt.Dimension(400, 200));

        frame.add(mainPanel);
        buttonPanel = new JPanel();
        buttonPanel.add(addButton);
        buttonPanel.add(removeButton);
        buttonPanel.add(clearAllTasksButton);
        
        mainPanel.add(inputPanel, BorderLayout.NORTH);
        mainPanel.add(scrollPane, BorderLayout.CENTER);
        mainPanel.add(buttonPanel, BorderLayout.SOUTH);

        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        
        addButton.addActionListener(new addTasks());
        removeButton.addActionListener(new removeTasks());
        clearAllTasksButton.addActionListener(new clearAllTasks());
        
        frame.setVisible(true);
    }

    public void addTasks() {
        String task = userInput.getText();
        if (!task.isEmpty()) {
            label.setText("Task: " + task + " has been added.");    
            taskMemory.addElement(task);       
            userInput.setText("");             
        }
        }

    public void removeTasks() {
        int selectedIndex = taskList.getSelectedIndex();
        if (selectedIndex != -1) { 
            taskMemory.remove(selectedIndex);
            label.setText("Task has been removed.");
        }
    }
    public void clearAllTasks() {
        if (!taskMemory.isEmpty()) { 
        taskMemory.clear();      
        label.setText("All tasks have been removed.");
    } else {
        label.setText("Task list is empty. There are no tasks to remove.");
    }
    }

    private class addTasks implements ActionListener {
        @Override
        public void actionPerformed(ActionEvent e) {
            addTasks();
        }
    }
    private class removeTasks implements ActionListener {
        @Override
        public void actionPerformed(ActionEvent e) {
            removeTasks();
        }
    }
    private class clearAllTasks implements ActionListener {
        @Override
        public void actionPerformed(ActionEvent e) {
            clearAllTasks();
        }
    }
    public static void main(String[] args) {
        new ToDoListGUI();
    }
}