Creating a JList in Java Swings

package jlist;

import javax.swing.*;
import java.awt.*;
import java.util.Vector;

public class JListExample1 extends JFrame {
	JList <String>list;
	DefaultListModel<String> listmodel;

    public JListExample1() {
        // Set the frame properties
        setTitle("JList Example");
        setSize(400, 250);
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setLayout(new FlowLayout());

        // Use ListModel to create another JList
        listmodel = new DefaultListModel<String>();
        listmodel.addElement("India");
        listmodel.addElement("China");
        listmodel.addElement("France");
        listmodel.addElement("Itly");
        listmodel.addElement("Japan");
        listmodel.addElement("United State");
        
        list = new JList<>(listmodel);
        list.setModel(listmodel);
        add(list);

        // Customize the JList
        list.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
        list.setFixedCellHeight(25);
        list.setFixedCellWidth(100);
        //Make Frame Visible
        setVisible(true);
    }

    public static void main(String[] args) {
        // Create the frame
        new JListExample1();
    }
}

package jlist;

import javax.swing.*;
import java.util.ArrayList;
import java.util.List;

public class JListExample2 extends JFrame {

	public JListExample2() {
		// Set the frame properties
		setTitle("JList Example");
		setSize(400, 250);
		setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

		//set layout of panel
		JPanel panel = new JPanel();
		add(panel);

		// Use ListModel to create another JList
		List<Integer> mylist= new ArrayList<>();
		for (int i = 2024; i >= 1900; i--) {
			mylist.add(i);
		}

		JList<Integer> jlist = new JList<>(mylist.toArray(new Integer[mylist.size()]));

		//add list to the panel
		panel.add(jlist);

		//Adding Scrollbar to the list
		JScrollPane scrollPane = new JScrollPane();
		scrollPane.setViewportView(jlist);
		jlist.setLayoutOrientation(JList.VERTICAL);
		panel.add(scrollPane);

		// Customize the JList
		jlist.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
		jlist.setFixedCellHeight(20);
		jlist.setFixedCellWidth(100);

		//Make Frame Visible
		setVisible(true);
	}

	public static void main(String[] args) {
		// Create the frame
		new JListExample2();
	}
}